Second pass at code to move feeds into IndexArchiveBundles. This code lets word iterators have a direction (asc/desc), for feeds will be desc. Remove MixCrawls for this. Disjoint and Neg iterators might still need modification. Also, still need to rework FeedUpdateJob, a=chris

diff --git a/src/configs/Config.php b/src/configs/Config.php
index 895273dc7..b04b9bdfe 100755
--- a/src/configs/Config.php
+++ b/src/configs/Config.php
@@ -158,7 +158,7 @@ function nsconddefine($constant, $value)
  * Version number for upgrade database function
  * @var int
  */
-nsdefine('DATABASE_VERSION', 67);
+nsdefine('DATABASE_VERSION', 68);
 /**
  * Minimum Version fo Yioop for which keyword ad script
  * still works with this version
@@ -766,6 +766,12 @@ nsdefine('PAGE_RANGE_REQUEST', 50000);
  * how many distinct generations to read in in one go
  */
 nsconddefine('NUM_DISTINCT_GENERATIONS', 20);
+/**
+ * Used in computing the DOC_RANK when a going through index in descending
+ * fashion.  It represents an upper bound on the maximum number of
+ * generations an IndexArchiveBundle should have
+ */
+nsconddefine('MAX_GENERATIONS', 10000);
 /**
  * Max number of chars to extract for description from a page to index.
  * Only words in the description are indexed. -- this is the default value
diff --git a/src/configs/Createdb.php b/src/configs/Createdb.php
index 897333a13..161550c53 100755
--- a/src/configs/Createdb.php
+++ b/src/configs/Createdb.php
@@ -483,14 +483,14 @@ foreach ($media_sources as $media_source) {
 $db->execute("INSERT INTO CRAWL_MIXES VALUES (2, 'images', ".ROOT_ID.", -1)");
 $db->execute("INSERT INTO MIX_FRAGMENTS VALUES(2, 0, 1)");
 $db->execute("INSERT INTO MIX_COMPONENTS VALUES(
-    2, 0, 1, 1, 'media:image')");
+    2, 0, 1, 1, 1, 'media:image')");
 $db->execute("INSERT INTO CRAWL_MIXES VALUES (3, 'videos', ".ROOT_ID.", -1)");
 $db->execute("INSERT INTO MIX_FRAGMENTS VALUES(3, 0, 1)");
 $db->execute("INSERT INTO MIX_COMPONENTS VALUES(
-    3, 0, 1, 1, 'media:video')");
+    3, 0, 1, 1, 1, 'media:video')");
 $db->execute("INSERT INTO CRAWL_MIXES VALUES (4, 'news', ".ROOT_ID.", -1)");
 $db->execute("INSERT INTO MIX_FRAGMENTS VALUES(4, 0, 1)");
-$db->execute("INSERT INTO MIX_COMPONENTS VALUES(4, 0, 100, 1,
+$db->execute("INSERT INTO MIX_COMPONENTS VALUES(4, 0, 100, 1, -1,
     'media:news')");
 $db->execute("INSERT INTO SUBSEARCH VALUES('db_subsearch_images',
     'images','m:2', 50, '')");
diff --git a/src/controllers/components/CrawlComponent.php b/src/controllers/components/CrawlComponent.php
index a2a9347e0..0ecc9e333 100644
--- a/src/controllers/components/CrawlComponent.php
+++ b/src/controllers/components/CrawlComponent.php
@@ -339,6 +339,12 @@ class CrawlComponent extends Component implements CrawlConstants
             'social_component_weight:"'.
                 tl('social_component_weight').'",'.
             'social_component_name:"'.tl('social_component_name').'",'.
+            'social_component_order:"'.
+                tl('social_component_order').'",'.
+            'social_component_ascending:"'.
+                tl('social_component_ascending').'",'.
+            'social_component_descending:"'.
+                tl('social_component_descending').'",'.
             'social_component_add_keywords:"'.
                 tl('social_component_add_keywords').'",'.
             'social_component_actions:"'.
@@ -379,6 +385,9 @@ class CrawlComponent extends Component implements CrawlConstants
                                         $component['CRAWL_TIMESTAMP'], "int");
                                 $row['WEIGHT'] = $parent->clean(
                                     $component['WEIGHT'], "float");
+                                $row['DIRECTION'] = ($parent->clean(
+                                    $component['DIRECTION'], "int") > 0) ? 1 :
+                                    -1;
                                 $row['KEYWORDS'] = $parent->clean(
                                     $component['KEYWORDS'],
                                     "string");
@@ -433,7 +442,7 @@ class CrawlComponent extends Component implements CrawlConstants
                     $crawl_ts = $component['CRAWL_TIMESTAMP'];
                     $crawl_name = $data['available_crawls'][$crawl_ts];
                     $data['SCRIPT'] .= $comma." [$crawl_ts, '$crawl_name', ".
-                        $component['WEIGHT'].", ";
+                        $component['WEIGHT'].", ".$component['DIRECTION'].", ";
                     $comma = ",";
                     $keywords = (isset($component['KEYWORDS'])) ?
                         $component['KEYWORDS'] : "";
diff --git a/src/data/public_default.db b/src/data/public_default.db
index f9fea163c..61e09832d 100644
Binary files a/src/data/public_default.db and b/src/data/public_default.db differ
diff --git a/src/library/CrawlConstants.php b/src/library/CrawlConstants.php
index 1546388a9..8119879bc 100755
--- a/src/library/CrawlConstants.php
+++ b/src/library/CrawlConstants.php
@@ -75,8 +75,8 @@ interface CrawlConstants
     const mirror_table_name = "mirror_table.txt";
     const local_ip_cache_file = "local_ip_cache.txt";
     /** used for word iterator direction  */
-    const FORWARD = 1;
-    const BACKWARD = -1;
+    const ASCENDING = 1;
+    const DESCENDING = -1;
     /** media feed index archive bundle timestamp */
     const FEED_CRAWL_TIME = 100;
     /** Used in priority queue*/
diff --git a/src/library/IndexArchiveBundle.php b/src/library/IndexArchiveBundle.php
index 88736b1a0..7465f6d88 100644
--- a/src/library/IndexArchiveBundle.php
+++ b/src/library/IndexArchiveBundle.php
@@ -294,7 +294,7 @@ class IndexArchiveBundle implements CrawlConstants
      * returns a reference to this shard
      * @return object last shard in the bundle
      */
-     public function getActiveShard($forward = true)
+     public function getActiveShard()
      {
         if ($this->setCurrentShard($this->generation_info['ACTIVE'])) {
             return $this->getCurrentShard();
@@ -317,8 +317,7 @@ class IndexArchiveBundle implements CrawlConstants
      *      merge dictionary side effects
      * @return object the currently being index shard
      */
-     public function getCurrentShard($force_read = false,
-        $direction = self::FORWARD)
+     public function getCurrentShard($force_read = false)
      {
         if (!isset($this->current_shard)) {
             if (!isset($this->generation_info['CURRENT'])) {
@@ -332,7 +331,7 @@ class IndexArchiveBundle implements CrawlConstants
                     $this->current_shard = new IndexShard(
                         $current_index_shard_file,
                         $this->generation_info['CURRENT'],
-                        $this->num_docs_per_generation, true, $direction);
+                        $this->num_docs_per_generation, true);
                     $this->current_shard->getShardHeader($force_read);
                     $this->current_shard->read_only_from_disk = true;
                 } else {
@@ -347,7 +346,7 @@ class IndexArchiveBundle implements CrawlConstants
             } else {
                 $this->current_shard = new IndexShard($current_index_shard_file,
                     $this->generation_info['CURRENT'],
-                    $this->num_docs_per_generation, $forward);
+                    $this->num_docs_per_generation);
             }
         }
         return $this->current_shard;
diff --git a/src/library/IndexManager.php b/src/library/IndexManager.php
index 1a7f87715..15a1dd96e 100644
--- a/src/library/IndexManager.php
+++ b/src/library/IndexManager.php
@@ -65,10 +65,9 @@ class IndexManager implements CrawlConstants
      * with a given timestamp or feed (for handling media feeds)
      *
      * @param string $index_name timestamp of desired IndexArchiveBundle
-     * @param int $direction
      * @return object the desired IndexArchiveBundle reference
      */
-    public static function getIndex($index_name, $direction = self::FORWARD)
+    public static function getIndex($index_name)
     {
         $index_name = trim($index_name); //trim to fix postgres quirkiness
         if (empty(self::$indexes[$index_name]) ||
@@ -83,9 +82,8 @@ class IndexManager implements CrawlConstants
                 $index_archive_name = self::index_data_base_name . $index_name;
             }
             if (file_exists(C\CRAWL_DIR.'/cache/' . $index_archive_name)) {
-                $tmp = new IndexArchiveBundle(
-                    C\CRAWL_DIR . '/cache/' . $index_archive_name, null,
-                    C\NUM_DOCS_PER_GENERATION, $direction);
+                $tmp = new IndexArchiveBundle(C\CRAWL_DIR . '/cache/' .
+                    $index_archive_name);
                 if (!$tmp) {
                     return false;
                 }
@@ -160,6 +158,8 @@ class IndexManager implements CrawlConstants
      */
     public static function getVersion($index_name)
     {
+        $index_name = (empty($index_name) || $index_name[0] != '-') ?
+            $index_name : substr($index_name, 1);
         if (intval($index_name) < C\VERSION_0_TIMESTAMP) {
             return 0;
         }
@@ -195,10 +195,6 @@ class IndexManager implements CrawlConstants
         $threshold = -1, $start_generation = -1, $num_distinct_generations = -1,
         $with_remaining_total = false)
     {
-        if ($index_name == self::FEED_CRAWL_TIME) {
-            $index_name = "feed";
-        }
-        $id = "$index_name:$start_generation:$num_distinct_generations";
         $index = self::getIndex($index_name);
         $tmp = [];
         if (!empty($index->dictionary)) {
@@ -213,10 +209,6 @@ class IndexManager implements CrawlConstants
             $total = 0;
             $info = [];
         }
-        if (isset($tmp[-1][3])) {
-            $total += $tmp[-1][3];
-            $info = $tmp + $info;
-        }
         return ($with_remaining_total) ? [$total, $info] : $info;
     }
     /**
diff --git a/src/library/IndexShard.php b/src/library/IndexShard.php
index 472972129..70ed6302b 100644
--- a/src/library/IndexShard.php
+++ b/src/library/IndexShard.php
@@ -209,12 +209,6 @@ class IndexShard extends PersistentStructure implements CrawlConstants
      * @var string
      */
     public $word_postings;
-    /**
-     * Specifies which direction an IndexShard will be traversed through using
-     * WordIterator
-     * @var bool
-     */
-    public $forward_direction;
     /**
      * Fraction of NUM_DOCS_PER_GENERATION document inserts before data
      * from the words array is flattened to word_postings. (It will
@@ -293,7 +287,7 @@ class IndexShard extends PersistentStructure implements CrawlConstants
      */
     public function __construct($fname, $generation = 0,
         $num_docs_per_generation = C\NUM_DOCS_PER_GENERATION,
-        $read_only_from_disk = false, $forward_direction = true)
+        $read_only_from_disk = false)
     {
         parent::__construct($fname, -1);
         $this->hash_name = crawlHash($fname);
@@ -316,7 +310,6 @@ class IndexShard extends PersistentStructure implements CrawlConstants
         $this->read_only_from_disk = $read_only_from_disk;
         $this->word_docs_packed = false;
         $this->blocks_words= [];
-        $this->forward_direction = $forward_direction;
     }
     /**
      * Used to pack a list of description scores and user ranks as a
@@ -658,12 +651,14 @@ class IndexShard extends PersistentStructure implements CrawlConstants
      * @param int& $next_offset where to start in word docs
      * @param int $last_offset offset at which to stop by
      * @param int $len number of documents desired
+     * @param int $direction which direction to iterate through elements
+     *      of the posting slice (self::ASCENDING or self::DESCENDING) as
+     *      compared to the order of when they were stored
      * @return array desired list of doc's and their info
      */
     public function getPostingsSlice($start_offset, &$next_offset, $last_offset,
-        $len, $forward = true)
+        $len, $direction = self::ASCENDING)
     {
-        $forward_dir = ($this->forward_direction && $forward);
         if (!$this->read_only_from_disk && !$this->word_docs_packed) {
             $this->mergeWordPostingsToString();
             $this->packWords(null);
@@ -671,20 +666,20 @@ class IndexShard extends PersistentStructure implements CrawlConstants
         } else if ($this->read_only_from_disk && empty($this->num_docs)) {
             $this->getShardHeader();
         }
-        // Normal forward iterator
-        if ($forward_dir) {
-            return $this->postingsSliceForward($start_offset, $next_offset,
+        // Normal ASCENDING iterator (same order as stored)
+        if ($direction == self::ASCENDING) {
+            return $this->postingsSliceAscending($start_offset, $next_offset,
                 $last_offset, $len);
         } else {
-            // Reverse direction iterator used for newsfeed
-            return $this->postingsSliceBackward($start_offset, $next_offset,
+            // Reverse direction used most commonly for feeds
+            return $this->postingsSliceDescending($start_offset, $next_offset,
                 $last_offset, $len);
         }
     }
     /**
      *
      */
-    public function postingsSliceForward($start_offset, &$next_offset,
+    public function postingsSliceAscending($start_offset, &$next_offset,
         $last_offset, $len)
     {
         $num_docs_so_far = 0;
@@ -714,7 +709,7 @@ class IndexShard extends PersistentStructure implements CrawlConstants
                 self::numDocsOrLinks($start_offset, $last_offset,
                     $total_posting_len / $num_postings_so_far);
             list($doc_id, , $item) =
-                $this->makeItem($posting, $num_docs_or_links);
+                $this->makeItem($posting, $num_docs_or_links, self::ASCENDING);
             $results[$doc_id] = $item;
             $num_docs_so_far += $next - $posting_start;
         } while ($next <= $last && $num_docs_so_far < $len);
@@ -724,7 +719,7 @@ class IndexShard extends PersistentStructure implements CrawlConstants
     /**
      *
      */
-    public function postingsSliceBackward($start_offset, &$next_offset,
+    public function postingsSliceDescending($start_offset, &$next_offset,
         $last_offset, $len)
     {
         $num_docs_so_far = 0;
@@ -733,7 +728,7 @@ class IndexShard extends PersistentStructure implements CrawlConstants
            when things are file-based and am still tracking down why
         */
         $wd_len = (isset($this->file_len)) ?
-        $this->file_len - $this->docids_len : $this->word_docs_len;
+            $this->file_len - $this->docids_len : $this->word_docs_len;
         /*  For a reverse shard, the arguments for start offset and
             last offset are the same. It actually gets reversed here,
             where end:=start and last:=start.
@@ -741,7 +736,7 @@ class IndexShard extends PersistentStructure implements CrawlConstants
         $end = $start_offset >> 2;
         $last = $start_offset >> 2;
         $next = $next_offset >> 2;
-        $posting_end = $next;
+        $posting_start = $next;
         $total_posting_len = 0;
         $num_postings_so_far = 0;
         $stop = 0;
@@ -749,7 +744,7 @@ class IndexShard extends PersistentStructure implements CrawlConstants
             if ($next < $end) {
                 break;
             }
-            $posting_start = $next;
+            $posting_end = $next;
             /* getPostingAtOffset will modify both start and end to the value of
                next using addresses
              */
@@ -758,12 +753,12 @@ class IndexShard extends PersistentStructure implements CrawlConstants
             $total_posting_len += strlen($posting);
             $num_postings_so_far++;
             $next = $posting_start - 1;
-            // getting the number of docs is the same forwards or backwards
+            // getting the number of docs is the same ascending as descending
             $num_docs_or_links =
                 self::numDocsOrLinks($start_offset, $last_offset,
                     $total_posting_len / $num_postings_so_far);
             list($doc_id, , $item) =
-                $this->makeItem($posting, $num_docs_or_links);
+                $this->makeItem($posting, $num_docs_or_links, self::DESCENDING);
             $results[$doc_id] = $item;
             $num_docs_so_far += $posting_end - $next;
         } while ($next >= $last && $num_docs_so_far < $len);
@@ -794,17 +789,27 @@ class IndexShard extends PersistentStructure implements CrawlConstants
      *
      * @param string $posting a posting entry from some words posting list
      * @param int $num_doc_or_links number of documents or links doc appears in
+     * @param int $direction whether to compute DOC_RAN based on the assumption
+     *      the iterator is traversing the index in an ascending or descending
+     *      fashion
      * @return array ($doc_id, posting_stats_array) for posting
      */
-    public function makeItem($posting, $num_doc_or_links)
+    public function makeItem($posting, $num_doc_or_links, $direction =
+        self::ASCENDING)
     {
         $doc_key_len = self::DOC_KEY_LEN;
         $offset = 0;
         list($doc_index, $position_list) = unpackPosting($posting, $offset);
         $item = [];
         $item[self::POSITION_LIST] = $position_list;
-        $doc_depth = log(($doc_index + 1) + (C\AVG_LINKS_PER_PAGE + 1) *
-            $this->num_docs_per_generation * $this->generation, 10);
+        if ($direction == self::ASCENDING) {
+            $doc_depth = log(($doc_index + 1) + (C\AVG_LINKS_PER_PAGE + 1) *
+                $this->num_docs_per_generation * $this->generation, 10);
+        } else {
+            $doc_depth = log(($this->num_docs_per_generation - $doc_index + 1) +
+                (C\MAX_GENERATIONS - (C\AVG_LINKS_PER_PAGE + 1) *
+                $this->num_docs_per_generation * $this->generation), 10);
+        }
         $item[self::DOC_RANK] = number_format(10 - $doc_depth, C\PRECISION);
         $doc_loc = $doc_index << 4;
         $tmp =
@@ -1103,61 +1108,101 @@ class IndexShard extends PersistentStructure implements CrawlConstants
      * @param int $start_offset first posting to consider
      * @param int $end_offset last posting before give up
      * @param int $doc_offset document offset we want to be greater than or
-     *     equal to
-     *
+     *     equal to (when ASCENDING) or less equal to (DESCENDING)
+     * @param int $direction which direction to iterate through elements
+     *      of the posting slice (self::ASCENDING or self::DESCENDING) as
+     *      compared to the order of when they were stored
      * @return array (int offset to next posting, doc_offset for this post)
      */
      public function nextPostingOffsetDocOffset($start_offset, $end_offset,
-        $doc_offset, $forward = true)
+        $doc_offset, $direction = self::ASCENDING)
     {
+        $is_ascending = ($direction == self::ASCENDING);
         $doc_index = $doc_offset >> 4;
         $start = $start_offset >> 2;
         $end = $end_offset >> 2;
-        $post_doc_index = $this->getDocIndexOfPostingAtOffset($end);
-        if ($doc_index > $post_doc_index) { //fail fast
+        $extrema = ($is_ascending) ? $end : $start;
+        $post_doc_index = $this->getDocIndexOfPostingAtOffset($extrema);
+        if (($is_ascending && $doc_index > $post_doc_index) ||
+            (!$is_ascending && $doc_index < $post_doc_index)) { //fail fast
             return false;
         } else if ($doc_index == $post_doc_index) {
-            return [$end << 2, $post_doc_index << 4];
+            return [$extrema << 2, $post_doc_index << 4];
         }
-        $current = 0;
-        if ($forward) {
-            $current = $start_offset >> 2;
+        if ($is_ascending) {
+            $current = $start;
             $post_doc_index = $this->gallopPostingOffsetDocOffset($current,
-            $doc_index, $end);
+                $doc_index, $end, $direction);
         } else {
-            $current = $end_offset >> 2;
+            $current = $end;
             $post_doc_index = $this->gallopPostingOffsetDocOffset($current,
-            $doc_index, $start);
+                $doc_index, $start, $direction);
         }
         if ($doc_index == $post_doc_index) {
             return [$current << 2, $post_doc_index << 4];
         }
-        $low = $start_offset >> 2;
+        return $this->binarySearchPostingOffsetDocOffset($start, $end,
+            $current, $doc_index, $direction);
+     }
+    /**
+     *
+     */
+    public function binarySearchPostingOffsetDocOffset($start, $end,
+        $current, $doc_index, $direction)
+    {
+        $low = $start;
         $high = $end;
-        do {
-            $post_doc_index = $this->getDocIndexOfPostingAtOffset($current);
-            if ($doc_index > $post_doc_index) {
-                $low = $current;
-                if ($current >= $end) {
-                    return false;
-                } else {
-                    if ($current + 1 == $high) {
-                        $current++;
-                        $low = $current;
+        if ($direction == self::ASCENDING) {
+            do {
+                $post_doc_index = $this->getDocIndexOfPostingAtOffset($current);
+                if ($doc_index > $post_doc_index) {
+                    $low = $current;
+                    if ($current >= $end) {
+                        return false;
+                    } else {
+                        if ($current + 1 == $high) {
+                            $current++;
+                            $low = $current;
+                        }
+                        $current = (($low + $high) >> 1);
                     }
+                } else if ($doc_index < $post_doc_index) {
+                    if ($low == $current) {
+                        return [$current << 2, $post_doc_index << 4];
+                    }
+                    $high = $current;
                     $current = (($low + $high) >> 1);
+                } else  {
+                    return [$current << 2, $post_doc_index << 4];
                 }
-            } else if ($doc_index < $post_doc_index) {
-                if ($low == $current) {
+            } while($current <= $end);
+        } else {
+            do {
+                $post_doc_index = $this->getDocIndexOfPostingAtOffset($current);
+                if ($doc_index < $post_doc_index) {
+                    $high = $current;
+                    if ($current <= $start) {
+                        return false;
+                    } else {
+                        if ($current - 1 == $low) {
+                            $current--;
+                            $high = $current;
+                        }
+                        $current = (($low + $high) >> 1);
+                    }
+                } else if ($doc_index > $post_doc_index) {
+                    if ($high == $current) {
+                        return [$current << 2, $post_doc_index << 4];
+                    }
+                    $high = $current;
+                    $current = (($low + $high) >> 1);
+                } else  {
                     return [$current << 2, $post_doc_index << 4];
                 }
-                $high = $current;
-                $current = (($low + $high) >> 1);
-            } else  {
-                return [$current << 2, $post_doc_index << 4];
-            }
-        } while($current <= $end);
-     }
+            } while($current >= $start);
+        }
+        return false;
+    }
     /**
      * Performs a galloping search (double forward jump distance each failure
      * step)  forward in a posting list from
@@ -1169,12 +1214,16 @@ class IndexShard extends PersistentStructure implements CrawlConstants
      * @param int $end last index of posting list
      * @return int document index bigger than or equal to $doc_index. Since
      *     $current points at the posting this occurs for if found, no success
-     *     by whether $current > $end.
+     *     by whether $current > $end
+     * @param int $direction which direction to iterate through elements
+     *      of the posting slice (self::ASCENDING or self::DESCENDING) as
+     *      compared to the order of when they were stored
      */
-    public function gallopPostingOffsetDocOffset(&$current, $doc_index, $end)
+    public function gallopPostingOffsetDocOffset(&$current, $doc_index, $end,
+        $direction)
     {
         $stride = 32;
-        if ($this->forward_direction) {
+        if ($direction == self::ASCENDING) {
             do {
                 $post_doc_index = $this->getDocIndexOfPostingAtOffset($current);
                 if ($doc_index <= $post_doc_index) {
@@ -1183,8 +1232,6 @@ class IndexShard extends PersistentStructure implements CrawlConstants
                 $current += $stride;
                 $stride <<= 1;
             } while($current <= $end);
-            $current = $end;
-            return $post_doc_index;
         } else {
             do {
                 $post_doc_index = $this->getDocIndexOfPostingAtOffset($current);
@@ -1194,10 +1241,9 @@ class IndexShard extends PersistentStructure implements CrawlConstants
                 $current -= $stride;
                 $stride <<= 1;
             } while($current >= $end);
-            $current = $end;
-            return $post_doc_index;
         }
-
+        $current = $end;
+        return $post_doc_index;
     }
     /**
      * Given an offset of a posting into the word_docs string, looks up
@@ -1206,8 +1252,8 @@ class IndexShard extends PersistentStructure implements CrawlConstants
      * @param int $offset byte/char offset into the word_docs string
      * @return int a document byte/char offset into the doc_infos string
      */
-    public function docOffsetFromPostingOffset($offset, $forward=true) {
-        $this->forward_direction = $forward;
+    public function docOffsetFromPostingOffset($offset)
+    {
         $doc_index = $this->getDocIndexOfPostingAtOffset($offset >> 2);
         return ($doc_index << 4);
     }
@@ -1221,19 +1267,20 @@ class IndexShard extends PersistentStructure implements CrawlConstants
      * @param int $len number of documents
      * @return array desired list of doc's and their info
      */
-    public function getPostingsSliceById($word_id, $len)
+    public function getPostingsSliceById($word_id, $len,
+        $direction = self::ASCENDING)
     {
         $results = [];
         $info = $this->getWordInfo($word_id, true);
         if ($info !== false) {
             list($first_offset, $last_offset,
                 $num_docs_or_links) = $info;
-            if ($this->forward_direction) {
+            if ($direction == self::ASCENDING) {
                 $results = $this->getPostingsSlice($first_offset,
                     $first_offset, $last_offset, $len);
             } else {
                 $results = $this->getPostingsSlice($first_offset,
-                    $last_offset, $last_offset, $len, false);
+                    $last_offset, $last_offset, $len, $direction);
             }
         }
         return $results;
diff --git a/src/library/PhraseParser.php b/src/library/PhraseParser.php
index 1d479ab9d..d90f2fd08 100755
--- a/src/library/PhraseParser.php
+++ b/src/library/PhraseParser.php
@@ -53,10 +53,10 @@ class PhraseParser
      * A list of meta words that might be extracted from a query
      * @var array
      */
-    public static $meta_words_list = ['\-', 'class:', 'class-score:', 'code:',
-        'date:', 'dns:', 'duration:', 'elink:', 'filetype:', 'guid:', 'host:',
-        'i:', 'info:', 'index:', 'ip:', 'link:', 'modified:',
-        'lang:', 'media:', 'location:', 'numlinks:', 'os:',
+    public static $meta_words_list = ['\-i:', '\-index:',  '\-', 'class:',
+        'class-score:', 'code:', 'date:', 'dns:', 'duration:', 'elink:',
+        'filetype:', 'guid:', 'host:', 'i:', 'info:', 'index:', 'ip:', 'link:',
+        'modified:', 'lang:', 'media:', 'location:', 'numlinks:', 'os:',
         'path:', 'robot:', 'safe:', 'server:', 'site:', 'size:',
         'time:', 'u:', 'version:','weight:', 'w:'
         ];
@@ -128,6 +128,8 @@ class PhraseParser
         $index_name = null, $exact_match = false, $threshold =
         C\MIN_RESULTS_TO_GROUP)
     {
+        $index_name = (empty($index_name) || $index_name[0] != '-') ?
+            $index_name : substr($index_name, 1);
         $char_class = C\NS_LOCALE . $lang . "\\resources\\Tokenizer";
         if (isset(self::$programming_language_map[$lang])) {
             $control_word = self::$programming_language_map[$lang] .
diff --git a/src/library/VersionFunctions.php b/src/library/VersionFunctions.php
index 09ab43367..1b5648230 100644
--- a/src/library/VersionFunctions.php
+++ b/src/library/VersionFunctions.php
@@ -1831,7 +1831,7 @@ EOD;
     }
 }
 /**
- * Upgrades a Version 65 version of the Yioop database to a Version 64 version
+ * Upgrades a Version 66 version of the Yioop database to a Version 65 version
  * @param object $db datasource to use to upgrade.
  */
 function upgradeDatabaseVersion66(&$db)
@@ -1840,7 +1840,7 @@ function upgradeDatabaseVersion66(&$db)
         C\TITLE_LEN . ") DEFAULT ''");
 }
 /**
- * Upgrades a Version 65 version of the Yioop database to a Version 64 version
+ * Upgrades a Version 67 version of the Yioop database to a Version 66 version
  * @param object $db datasource to use to upgrade.
  */
 function upgradeDatabaseVersion67(&$db)
@@ -1850,3 +1850,16 @@ function upgradeDatabaseVersion67(&$db)
     $db->execute("ALTER TABLE SUBSEARCH ADD COLUMN " .
         "DEFAULT_QUERY VARCHAR(" . C\TITLE_LEN . ") DEFAULT ''");
 }
+/**
+ * Upgrades a Version 68 version of the Yioop database to a Version 67 version
+ * @param object $db datasource to use to upgrade.
+ */
+function upgradeDatabaseVersion68(&$db)
+{
+    $db->execute("ALTER TABLE ROLE_ACTIVITY ADD COLUMN " .
+        "DIRECTION INT DEFAULT 1");
+    $db->execute("DELETE FROM MIX_COMPONENTS WHERE TIMESTAMP = 4 AND
+        FRAGMENT_ID = 0");
+    $db->execute("INSERT INTO MIX_COMPONENTS VALUES(4, 0, 100, 1, -1,
+        'media:news')");
+}
diff --git a/src/library/index_bundle_iterators/DisjointIterator.php b/src/library/index_bundle_iterators/DisjointIterator.php
index abff878c4..323ce306e 100644
--- a/src/library/index_bundle_iterators/DisjointIterator.php
+++ b/src/library/index_bundle_iterators/DisjointIterator.php
@@ -93,6 +93,16 @@ class DisjointIterator extends IndexBundleIterator
         }
         $this->leastGenDocOffsetsAmongstIterators();
     }
+    /**
+     *
+     */
+    public function getDirection()
+    {
+        if (!empty($this->index_bundle_iterators[0])) {
+            return $this->index_bundle_iterators[0]->getDirection();
+        }
+        return self::ASCENDING;
+    }
     /**
      * Returns the iterators to the first document block that it could iterate
      * over
@@ -151,6 +161,7 @@ class DisjointIterator extends IndexBundleIterator
     {
         $least_gen_offset = -1;
         $this->least_offset_index = 0;
+        $direction = $this->getDirection();
         for ($i = 0; $i < $this->num_iterators; $i++) {
             $cur_gen_doc_offset =
                 $this->index_bundle_iterators[
@@ -162,12 +173,8 @@ class DisjointIterator extends IndexBundleIterator
             } else if ($cur_gen_doc_offset == -1) {
                 continue;
             }
-            $forward = true;
-            if ($this->index_bundle_iterators[$i] instanceof ReverseIterator) {
-                $forward = false;
-            }
             $gen_doc_cmp = $this->genDocOffsetCmp($cur_gen_doc_offset,
-                $least_gen_offset, $forward);
+                $least_gen_offset, $direction);
             if ($gen_doc_cmp < 0) {
                 $least_gen_offset = $cur_gen_doc_offset;
                 $this->least_offset_index = $i;
@@ -188,15 +195,12 @@ class DisjointIterator extends IndexBundleIterator
         //num_docs can change when advance() called so that's why we recompute
         $total_num_docs = 0;
         if ($gen_doc_offset !== null) {
+            $direction = $this->getDirection();
             for ($i = 0; $i < $this->num_iterators; $i++) {
                 $cur_gen_doc_offset = $this->index_bundle_iterators[
                     $i]->currentGenDocOffsetWithWord();
-                $forward = true;
-                if ($this->index_bundle_iterators[$i] instanceof ReverseIterator) {
-                    $forward = false;
-                }
                 if ($this->genDocOffsetCmp($cur_gen_doc_offset,
-                    $gen_doc_offset, $forward) < 0) {
+                    $gen_doc_offset, $direction) < 0) {
                     if ($no_change) {
                         $this->current_block_fresh = false;
                         $this->seen_docs += 1;
@@ -218,7 +222,9 @@ class DisjointIterator extends IndexBundleIterator
             $this->seen_docs += 1;
             $this->seen_docs_unfiltered = 0;
             $least= $this->least_offset_index;
-            if (!isset($this->index_bundle_iterators[$least])) { return; }
+            if (!isset($this->index_bundle_iterators[$least])) {
+                return;
+            }
             $this->seen_docs_unfiltered +=
                 $this->index_bundle_iterators[$least]->seen_docs;
             $total_num_docs += $this->index_bundle_iterators[$least]->num_docs;
diff --git a/src/library/index_bundle_iterators/DocIterator.php b/src/library/index_bundle_iterators/DocIterator.php
index 9c2d2cbd0..321f313b8 100755
--- a/src/library/index_bundle_iterators/DocIterator.php
+++ b/src/library/index_bundle_iterators/DocIterator.php
@@ -101,11 +101,13 @@ class DocIterator extends IndexBundleIterator
      *      be returned by a findDocsWithWord call
      */
     public function __construct($index_name, $filter = null,
-        $results_per_block = IndexBundleIterator::RESULTS_PER_BLOCK)
+        $results_per_block = IndexBundleIterator::RESULTS_PER_BLOCK,
+        $direction = self::ASCENDING)
     {
         $this->filter = $filter;
         $this->index_name =  $index_name;
-        $index = IndexManager::getIndex($index_name);
+        $this->direction = $direction;
+        $index = IndexManager::getIndex($index_name, $direction);
         $info = $index->getArchiveInfo($index->dir_name);
         $this->num_docs = $info['COUNT'];
         $this->num_generations = (isset($index->generation_info['ACTIVE'])) ?
@@ -141,7 +143,8 @@ class DocIterator extends IndexBundleIterator
         if (isset($this->shard_lens[$generation])) {
             $this->last_offset = $this->shard_lens[$generation];
         } else {
-            $index = IndexManager::getIndex($this->index_name);
+            $index = IndexManager::getIndex($this->index_name,
+                $this->direction);
             $index->setCurrentShard($generation, true);
             $shard = $index->getCurrentShard();
             $this->last_offset = $shard->docids_len;
@@ -164,7 +167,7 @@ class DocIterator extends IndexBundleIterator
         }
         $pre_results = [];
         $this->next_offset = $this->current_offset;
-        $index = IndexManager::getIndex($this->index_name);
+        $index = IndexManager::getIndex($this->index_name, $this->direction);
         $index->setCurrentShard($this->current_generation, true);
         //the next call also updates next offset
         $shard = $index->getCurrentShard();
@@ -185,7 +188,7 @@ class DocIterator extends IndexBundleIterator
             }
             $this->next_offset += ($num_keys + 1) * $doc_key_len;
             $pre_results[$doc_id] = $item;
-            $num_docs_so_far ++;
+            $num_docs_so_far++;
         } while ($num_docs_so_far <  $this->results_per_block);
         $results = [];
         $doc_key_len = IndexShard::DOC_KEY_LEN;
diff --git a/src/library/index_bundle_iterators/GroupIterator.php b/src/library/index_bundle_iterators/GroupIterator.php
index 7e3c1da68..4bb2ee81b 100644
--- a/src/library/index_bundle_iterators/GroupIterator.php
+++ b/src/library/index_bundle_iterators/GroupIterator.php
@@ -127,9 +127,18 @@ class GroupIterator extends IndexBundleIterator
         $this->results_per_block /=  ceil($num_iterators/2);
         $this->network_flag = $network_flag;
         $this->current_machine = $current_machine;
-        $this->is_feed = false;
         $this->reset();
     }
+    /**
+     *
+     */
+    public function getDirection()
+    {
+        if (!empty($this->index_bundle_iterators)) {
+            return $this->index_bundle_iterators->getDirection();
+        }
+        return self::ASCENDING;
+    }
     /**
      * Returns the iterators to the first document block that it could iterate
      * over
@@ -233,11 +242,6 @@ class GroupIterator extends IndexBundleIterator
                     continue;
             }
             $hash_url = substr($doc_key, 0, IndexShard::DOC_KEY_LEN);
-            if (isset($doc_info[self::IS_FEED])) {
-                $this->is_feed = true;
-            } else {
-                $this->is_feed = false;
-            }
             // initial aggregate domain score vector for given domain
             if ($doc_info[self::IS_DOC]) {
                 if (!isset($pre_out_pages[$hash_url])) {
diff --git a/src/library/index_bundle_iterators/IndexBundleIterator.php b/src/library/index_bundle_iterators/IndexBundleIterator.php
index 74fb5ff34..6959afb59 100644
--- a/src/library/index_bundle_iterators/IndexBundleIterator.php
+++ b/src/library/index_bundle_iterators/IndexBundleIterator.php
@@ -149,9 +149,10 @@ abstract class IndexBundleIterator implements CrawlConstants
      * @param array $gen_doc2  second ordered pair
      * @return int -1,0,1 depending on which is bigger
      */
-     public function genDocOffsetCmp($gen_doc1, $gen_doc2, $forward=true)
+     public function genDocOffsetCmp($gen_doc1, $gen_doc2, $direction =
+        self::ASCENDING)
      {
-        if ($forward) {
+        if ($direction == self::ASCENDING) {
             //less generation or greater
             if ($gen_doc1[0] < $gen_doc2[0]) {
                 return -1;
@@ -164,7 +165,7 @@ abstract class IndexBundleIterator implements CrawlConstants
             } else if ($gen_doc1[1] > $gen_doc2[1]) {
                 return 1;
             }
-        } else if (!$forward) {
+        } else {
             //less generation or greater for reverse
             if ($gen_doc1[0] < $gen_doc2[0]) {
                 return 1;
@@ -180,7 +181,14 @@ abstract class IndexBundleIterator implements CrawlConstants
         }
         //equal
         return 0;
-     }
+    }
+    /**
+     *
+     */
+    public function getDirection()
+    {
+        return self::ASCENDING;
+    }
     /**
      * Gets the current block of doc ids and score associated with the
      * this iterators word
diff --git a/src/library/index_bundle_iterators/IntersectIterator.php b/src/library/index_bundle_iterators/IntersectIterator.php
index 29d7316fc..3d9936267 100644
--- a/src/library/index_bundle_iterators/IntersectIterator.php
+++ b/src/library/index_bundle_iterators/IntersectIterator.php
@@ -236,7 +236,7 @@ class IntersectIterator extends IndexBundleIterator
                 }
             }
         }
-        $this->count_block = count($docs);
+        $this->count_block = (empty($docs)) ? 0 : count($docs);
         $this->pages = $docs;
         return $docs;
     }
@@ -416,11 +416,8 @@ class IntersectIterator extends IndexBundleIterator
         }
         $gen_doc_offset[0] = $biggest_gen_offset;
         $all_same = true;
-        $forward = true;
+        $direction = $this->getDirection();
         for ($i = 1; $i < $this->num_iterators; $i++) {
-            if ($this->index_bundle_iterators[$i] instanceof ReverseIterator) {
-                $forward = false;
-            }
             $retrieve_postings_time = microtime(true);
             if ((($cur_gen_doc_offset = $this->index_bundle_iterators[
                 $i]->currentGenDocOffsetWithWord()) == -1) ||
@@ -429,7 +426,7 @@ class IntersectIterator extends IndexBundleIterator
             }
             $gen_doc_offset[$i] = $cur_gen_doc_offset;
             $gen_doc_cmp = $this->genDocOffsetCmp($cur_gen_doc_offset,
-                $biggest_gen_offset, $forward);
+                $biggest_gen_offset, $direction);
             if ($gen_doc_cmp > 0) {
                 $biggest_gen_offset = $cur_gen_doc_offset;
                 $all_same = false;
@@ -448,7 +445,7 @@ class IntersectIterator extends IndexBundleIterator
                 return -1;
             }
             if ($this->genDocOffsetCmp($gen_doc_offset[$i],
-                $biggest_gen_offset, $forward) < 0) {
+                $biggest_gen_offset, $direction) < 0) {
                 $iterator = $this->index_bundle_iterators[$i];
                 $iterator->advance($biggest_gen_offset);
                 if( ($cur_gen_doc_offset =
@@ -457,7 +454,7 @@ class IntersectIterator extends IndexBundleIterator
                 }
                 $gen_doc_offset[$i] = $cur_gen_doc_offset;
                 if ($this->genDocOffsetCmp($cur_gen_doc_offset,
-                    $biggest_gen_offset, $forward) > 0) {
+                    $biggest_gen_offset, $direction) > 0) {
                     $last_changed = $i;
                     $biggest_gen_offset = $cur_gen_doc_offset;
                 }
@@ -471,6 +468,16 @@ class IntersectIterator extends IndexBundleIterator
         }
         return 1;
     }
+    /**
+     *
+     */
+    public function getDirection()
+    {
+        if (!empty($this->index_bundle_iterators[0])) {
+            return $this->index_bundle_iterators[0]->getDirection();
+        }
+        return self::ASCENDING;
+    }
     /**
      * Forwards the iterator one group of docs
      * @param array $gen_doc_offset a generation, doc_offset pair. If set,
diff --git a/src/library/index_bundle_iterators/NegationIterator.php b/src/library/index_bundle_iterators/NegationIterator.php
index 2db44c705..a3ad9c82b 100644
--- a/src/library/index_bundle_iterators/NegationIterator.php
+++ b/src/library/index_bundle_iterators/NegationIterator.php
@@ -63,9 +63,11 @@ class NegationIterator extends IndexBundleIterator
      */
     public function __construct($index_bundle_iterator)
     {
+        $direction = $index_bundle_iterator->getDirection();
         $this->index_bundle_iterators[0] = new DocIterator(
             $index_bundle_iterator->index_name,
-            $index_bundle_iterator->filter);
+            $index_bundle_iterator->filter,
+            $index_bundle_iterator->results_per_block, $direction);
         $this->index_bundle_iterators[1] = $index_bundle_iterator;
         $this->num_iterators = 2;
         $this->num_docs = 0;
@@ -73,6 +75,16 @@ class NegationIterator extends IndexBundleIterator
         $this->num_docs = $this->index_bundle_iterators[0]->num_docs;
         $this->reset();
     }
+    /**
+     *
+     */
+    public function getDirection()
+    {
+        if (!empty($this->index_bundle_iterators[0])) {
+            return $this->index_bundle_iterators[0]->getDirection();
+        }
+        return self::ASCENDING;
+    }
     /**
      * Returns the iterators to the first document block that it could iterate
      * over
diff --git a/src/library/index_bundle_iterators/NetworkIterator.php b/src/library/index_bundle_iterators/NetworkIterator.php
index c2182164f..94d446b76 100644
--- a/src/library/index_bundle_iterators/NetworkIterator.php
+++ b/src/library/index_bundle_iterators/NetworkIterator.php
@@ -114,7 +114,7 @@ class NetworkIterator extends IndexBundleIterator
         $this->results_per_block = ceil(C\MIN_RESULTS_TO_GROUP);
         $this->next_results_per_block = $this->results_per_block;
         $this->hard_query = false;
-        $this->base_query = "q=".urlencode($query).
+        $this->base_query = "q=" . urlencode($query).
             "&f=serial&network=false&raw=1&its=$timestamp&guess=false";
         if ($save_timestamp_name != "") {
             // used for archive crawls of crawl mixes
diff --git a/src/library/index_bundle_iterators/ReverseIterator.php b/src/library/index_bundle_iterators/ReverseIterator.php
deleted file mode 100644
index a11ac0810..000000000
--- a/src/library/index_bundle_iterators/ReverseIterator.php
+++ /dev/null
@@ -1,456 +0,0 @@
-<?php
-/**
- * SeekQuarry/Yioop --
- * Open Source Pure PHP Search Engine, Crawler, and Indexer
- *
- * Copyright (C) 2009 - 2019  Chris Pollett chris@pollett.org
- *
- * LICENSE:
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- *
- * END LICENSE
- *
- * @author Chris Pollett chris@pollett.org
- * @license https://www.gnu.org/licenses/ GPL3
- * @link https://www.seekquarry.com/
- * @copyright 2009 - 2019
- * @filesource
- */
-namespace seekquarry\yioop\library\index_bundle_iterators;
-
-use seekquarry\yioop\configs as C;
-use seekquarry\yioop\library as L;
-use seekquarry\yioop\library\IndexShard;
-use seekquarry\yioop\library\IndexManager;
-
-/**
- * Used to iterate through the documents associated with a word in
- * an IndexArchiveBundle. It also makes it easy to get the summaries
- * of these documents.
- *
- * A description of how words and the documents containing them are stored
- * is given in the documentation of IndexArchiveBundle.
- *
- * @author Chris Pollett and Tim Chow
- * @see IndexArchiveBundle
- */
-class ReverseIterator extends IndexBundleIterator
-{
-    /**
-     * hash of word or phrase that the iterator iterates over
-     * @var string
-     */
-    public $word_key;
-    /**
-     * Position from end of key that doesn't have to be an exact match
-     * (for phrases as using suffix tree)
-     * @var int
-     */
-    public $shift;
-    /**
-     * The timestamp of the index is associated with this iterator
-     * @var string
-     */
-    public $index_name;
-    /**
-     * First shard generation that word info was obtained for
-     * @var int
-     */
-    public $start_generation;
-    /**
-     * Used to keep track of whether getWordInfo might still get more
-     * data on the search terms as advance generations
-     * @var bool
-     */
-    public $no_more_generations;
-    /**
-     * The next byte offset in the IndexShard
-     * @var int
-     */
-    public $next_offset;
-    /**
-     * An array of shard generation and posting list offsets, lengths, and
-     * numbers of documents
-     * @var array
-     */
-    public $dictionary_info;
-    /**
-     * The total number of shards that have data for this word
-     * @var int
-     */
-    public $num_generations;
-    /**
-     * Index into dictionary_info corresponding to the current shard
-     * @var int
-     */
-    public $generation_pointer;
-    /**
-     * Numeric number of current shard
-     * @var int
-     */
-    public $current_generation;
-    /**
-     * The current byte offset in the IndexShard
-     * @var int
-     */
-    public $current_offset;
-    /**
-     * Starting Offset of word occurence in the IndexShard
-     * @var int
-     */
-    public $start_offset;
-    /**
-     * Last Offset of word occurence in the IndexShard
-     * @var int
-     */
-    public $last_offset;
-    /**
-     * Keeps track of whether the word_iterator list is empty because the
-     * word does not appear in the index shard
-     * @var int
-     */
-    public $empty;
-    /**
-     * Keeps track of whether the word_iterator list is empty because the
-     * word does not appear in the index shard
-     * @var int
-     */
-    public $filter;
-    /**
-     * The current value of the doc_offset of current posting if known
-     * @var int
-     */
-    public $current_doc_offset;
-    /** Host Key position + 1 (first char says doc, inlink or eternal link)*/
-    const HOST_KEY_POS = 17;
-    /** Length of a doc key*/
-    const KEY_LEN = 8;
-    /**
-     * Creates a word iterator with the given parameters.
-     *
-     * @param string $word_key hash of word or phrase to iterate docs of
-     * @param string $shift up to what point in key should be a match
-     *      when do dictionary look up (for phrases because using suffix tree)
-     * @param string $index_name time_stamp of the to use
-     * @param bool $raw whether the $word_key is our variant of base64 encoded
-     * @param array $filter an array of hashes of domains to filter from
-     *     results
-     * @param int $results_per_block the maximum number of results that can
-     *      be returned by a findDocsWithWord call
-     */
-    public function __construct($word_key, $shift, $index_name, $raw = false,
-        $filter = null, $results_per_block =
-        IndexBundleIterator::RESULTS_PER_BLOCK)
-    {
-        if ($raw == false) {
-            //get rid of out modified base64 encoding
-            $word_key = L\unbase64Hash($word_key);
-        }
-        $this->filter = $filter;
-        $this->word_key = $word_key;
-        $this->shift = $shift;
-        $this->index_name = $index_name;
-        list($this->num_docs, $this->dictionary_info) =
-            IndexManager::getWordInfo($index_name, $word_key, $shift,
-            -1, -1, C\NUM_DISTINCT_GENERATIONS, true);
-        if ($this->dictionary_info === false) {
-            $this->empty = true;
-        } else {
-            ksort($this->dictionary_info);
-            $this->dictionary_info = array_values($this->dictionary_info);
-            $this->num_generations = count($this->dictionary_info);
-            if ($this->num_generations == 0) {
-                $this->empty = true;
-            } else {
-                $this->empty = false;
-            }
-        }
-        $this->no_more_generations =
-            ($this->num_generations < C\NUM_DISTINCT_GENERATIONS);
-        $this->current_doc_offset = null;
-        $this->results_per_block = $results_per_block;
-        $this->current_block_fresh = false;
-        $this->start_generation = $this->num_generations-1;
-        if ($this->dictionary_info !== false) {
-            $this->reset();
-        }
-    }
-    /**
-     * Resets the iterator to the first document block that it could iterate
-     * over
-     * Reversed
-     */
-    public function reset()
-    {
-        if (!$this->empty) {//we shouldn't be called when empty - but to be safe
-            if ($this->start_generation < $this->num_generations-1) {
-                list($this->num_docs, $this->dictionary_info) =
-                    IndexManager::getWordInfo($this->index_name,
-                    $this->word_key, 0, -1, 0, C\NUM_DISTINCT_GENERATIONS,
-                    true);
-                ksort($this->dictionary_info);
-                $this->dictionary_info = array_values($this->dictionary_info);
-                $this->num_generations = count($this->dictionary_info);
-                $this->no_more_generations =
-                    ($this->num_generations < C\NUM_DISTINCT_GENERATIONS);
-            }
-            list($this->current_generation, $this->start_offset,
-                $this->last_offset, )
-                = $this->dictionary_info[$this->num_generations-1];
-        }
-        $this->current_offset = $this->last_offset;
-        /*  reset pointer to the number of gens, which in reverse is the
-           first one we want
-         */
-        $this->generation_pointer = $this->num_generations - 1;
-        $this->count_block = 0;
-        $this->seen_docs = 0;
-        $this->current_doc_offset = null;
-    }
-    /**
-     * Hook function used by currentDocsWithWord to return the current block
-     * of docs if it is not cached
-     *
-     * @return mixed doc ids and score if there are docs left, -1 otherwise
-     */
-    public function findDocsWithWord()
-    {
-        if ($this->empty) {
-            return -1;
-        }
-        if (($this->generation_pointer>=$this->num_generations)
-            || ($this->generation_pointer == 0 &&
-            $this->current_offset < $this->start_offset)) {
-            return -1;
-        }
-        $pre_results = [];
-        if (!$this->empty) {
-            $this->next_offset = $this->current_offset;
-            $index = IndexManager::getIndex($this->index_name, false);
-            $index->setCurrentShard($this->current_generation, true);
-            //the next call also updates next offset
-            $shard = $index->getCurrentShard(false, false);
-            $pre_results = $shard->getPostingsSlice($this->start_offset,
-                $this->next_offset, $this->last_offset,
-                $this->results_per_block, false);
-            if($this->index_name == "feed") {
-                $time = time();
-                foreach ($pre_results as $keys => $pre_result) {
-                    $page = $index->getPage($pre_result[self::SUMMARY_OFFSET],
-                        $this->current_generation);
-                    $delta = $time - $page[self::PUBDATE];
-                    $pre_results[$keys][self::DOC_RANK] = 720000 /
-                        max($delta, 1);
-                }
-            }
-        }
-        $results = [];
-        $doc_key_len = IndexShard::DOC_KEY_LEN;
-        foreach ($pre_results as $keys => $data) {
-            $host_key = substr($keys, self::HOST_KEY_POS, self::KEY_LEN);
-            if (!empty($this->filter) && $this->filter->isFiltered($host_key)) {
-                continue;
-            }
-            $data[self::KEY] = $keys;
-            // inlinks is the domain of the inlink
-            $key_parts = str_split($keys, $doc_key_len);
-            if (isset($key_parts[2])) {
-                list($hash_url, $data[self::HASH], $data[self::INLINKS]) =
-                    $key_parts;
-            } else {
-                continue;
-            }
-            $data[self::CRAWL_TIME] = $this->index_name;
-            $results[$keys] = $data;
-        }
-        $this->count_block = count($results);
-        if ($this->generation_pointer == $this->num_generations - 1 &&
-            $results == []) {
-            $results = null;
-        }
-        $this->pages = $results;
-        return $results;
-    }
-    /**
-     * Updates the seen_docs count during an advance() call
-     * For a reverse shard, instead of adding to the offset, we subtract by a
-     * block instead.
-     */
-    public function advanceSeenDocs()
-    {
-        if ($this->current_block_fresh != true) {
-            $total_guess = IndexShard::numDocsOrLinks($this->next_offset,
-                    $this->start_offset);
-            $num_docs = $total_guess % $this->results_per_block;
-            if ($num_docs == 0) {
-                $num_docs = $this->results_per_block;
-            } else {
-                $num_docs = IndexShard::numDocsOrLinks($this->start_offset,
-                    $this->last_offset)%$this->results_per_block;
-            }
-            $this->next_offset = $this->current_offset;
-            $this->next_offset -= IndexShard::POSTING_LEN * $num_docs;
-            if ($num_docs <= 0) {
-                return;
-            }
-        } else {
-            $num_docs = $this->count_block;
-        }
-        $this->current_block_fresh = false;
-        $this->seen_docs += $num_docs;
-    }
-    /**
-     * Forwards the iterator one group of docs
-     * @param array $gen_doc_offset a generation, doc_offset pair. If set,
-     *     the must be of greater than or equal generation, and if equal the
-     *     next block must all have $doc_offsets larger than or equal to
-     *     this value
-     */
-    public function advance($gen_doc_offset = null)
-    {
-        if ($gen_doc_offset == null) {
-            $this->plainAdvance();
-            return;
-        }
-        $cur_gen_doc_offset = $this->currentGenDocOffsetWithWord();
-        if ($cur_gen_doc_offset == -1 ||
-            $this->genDocOffsetCmp($cur_gen_doc_offset, $gen_doc_offset) < 0) {
-            return;
-        }
-        $this->plainAdvance();
-        if ($this->current_generation > $gen_doc_offset[0]) {
-            $this->advanceGeneration($gen_doc_offset[0]);
-            $this->next_offset = $this->current_offset;
-        }
-        $index = IndexManager::getIndex($this->index_name, false);
-        $index->setCurrentShard($this->current_generation, true);
-        $shard = $index->getCurrentShard(false, false);
-        $start = $this->start_offset;
-        if ($this->current_generation == $gen_doc_offset[0]) {
-            $offset_pair = $shard->nextPostingOffsetDocOffset(
-                 $start, $this->next_offset, $gen_doc_offset[1], false);
-            if ($offset_pair === false) {
-                $this->advanceGeneration();
-                $this->next_offset = $this->current_offset;
-            } else {
-                list($this->current_offset, $this->current_doc_offset) =
-                    $offset_pair;
-            }
-        }
-        $this->seen_docs =  0;
-        $this->seen_docs += ($this->current_offset - $this->start_offset) /
-            IndexShard::POSTING_LEN;
-    }
-    /**
-     * Forwards the iterator one group of docs. This is what's called
-     * by @see advance($gen_doc_offset) if $gen_doc_offset is null
-     * Reversed
-     */
-    public function plainAdvance()
-    {
-        $this->advanceSeenDocs();
-        $this->current_doc_offset = null;
-        # RC if the current offset is greater than the next
-        if ($this->current_offset > $this->next_offset) {
-            $this->current_offset = $this->next_offset;
-        } else {
-            $this->advanceGeneration();
-            $this->next_offset = $this->current_offset;
-        }
-        # if the current offset is smaller, then we need to get next
-        # generation
-        if ($this->current_offset < $this->start_offset) {
-            $this->advanceGeneration();
-            $this->next_offset = $this->current_offset;
-        }
-    }
-    /**
-     * Switches which index shard is being used to return occurrences of
-     * the word to the next shard containing the word
-     * Reversed
-     *
-     * @param int $generation generation to advance beyond
-     */
-    public function advanceGeneration($generation = null)
-    {
-        if ($generation === null) {
-            $generation = $this->current_generation;
-        }
-        do {
-            // RC if the pointer is greater than the total generations, subtract
-            if ($this->generation_pointer >= 0) {
-                $this->generation_pointer--;
-            }
-            /* RC if the generation pointer is still more than the number of
-               generations
-             */
-            if ($this->generation_pointer >= 0) {
-                list($this->current_generation, $this->start_offset,
-                    $this->last_offset, )
-                    = $this->dictionary_info[$this->generation_pointer];
-                //set the current offset to the last one of the dictionary
-                $this->current_offset = $this->last_offset;
-            }
-            // if there are more generations and
-            if (!$this->no_more_generations &&
-                $this->current_generation > $generation &&
-                $this->generation_pointer <= 0) {
-                list($estimated_remaining_total, $info) =
-                    IndexManager::getWordInfo($this->index_name,
-                    $this->word_key, 0, -1, $this->num_generations,
-                    C\NUM_DISTINCT_GENERATIONS, true);
-                if (count($info) > 0) {
-                    $this->num_docs = $this->seen_docs +
-                        $estimated_remaining_total;
-                    ksort($info);
-                    $this->dictionary_info = array_merge($this->dictionary_info,
-                        array_values($info));
-                    $this->num_generations = count($this->dictionary_info);
-                    $this->no_more_generations =
-                        count($info) < C\NUM_DISTINCT_GENERATIONS;
-                    //will increment back to where were next loop
-                    $this->generation_pointer++;
-                }
-            }
-        # whle the current generation is greater than supplied argument
-        } while($this->current_generation > $generation &&
-        # of if we haven't hit the zeroeth generation
-            $this->generation_pointer >= 0);
-    }
-    /**
-     * Gets the doc_offset and generation for the next document that
-     * would be return by this iterator
-     *
-     * @return mixed an array with the desired document offset
-     * and generation; -1 on fail
-     */
-    public function currentGenDocOffsetWithWord() {
-        if ($this->current_doc_offset !== null) {
-            return [$this->current_generation, $this->current_doc_offset];
-        }
-        /* if the current offset is before the first one,
-           or if gen pointer is less than 0 we are in an impossible position
-         */
-        if ($this->current_offset < $this->start_offset||
-            $this->generation_pointer <= -1) {
-            return -1;
-        }
-        $index = IndexManager::getIndex($this->index_name, false);
-        $index->setCurrentShard($this->current_generation, true);
-        $this->current_doc_offset = $index->getCurrentShard(
-            )->docOffsetFromPostingOffset($this->current_offset, false);
-        return [$this->current_generation, $this->current_doc_offset];
-    }
-}
diff --git a/src/library/index_bundle_iterators/UnionIterator.php b/src/library/index_bundle_iterators/UnionIterator.php
index b20a63a06..84d63c576 100644
--- a/src/library/index_bundle_iterators/UnionIterator.php
+++ b/src/library/index_bundle_iterators/UnionIterator.php
@@ -105,6 +105,16 @@ class UnionIterator extends IndexBundleIterator
         }
         $doc_block = $this->currentDocsWithWord();
     }
+    /**
+     *
+     */
+    public function getDirection()
+    {
+        if (!empty($this->index_bundle_iterators[0])) {
+            return $this->index_bundle_iterators[0]->getDirection();
+        }
+        return self::ASCENDING;
+    }
     /**
      * Returns the iterators to the first document block that it could iterate
      * over
diff --git a/src/library/index_bundle_iterators/WordIterator.php b/src/library/index_bundle_iterators/WordIterator.php
index bc80db2c1..53f9d1f78 100644
--- a/src/library/index_bundle_iterators/WordIterator.php
+++ b/src/library/index_bundle_iterators/WordIterator.php
@@ -107,12 +107,12 @@ class WordIterator extends IndexBundleIterator
      */
     public $current_offset;
     /**
-     * Starting Offset of word occurence in the IndexShard
+     * Starting Offset of word occurrence in the IndexShard
      * @var int
      */
     public $start_offset;
     /**
-     * Last Offset of word occurence in the IndexShard
+     * Last Offset of word occurrence in the IndexShard
      * @var int
      */
     public $last_offset;
@@ -148,19 +148,26 @@ class WordIterator extends IndexBundleIterator
      *      of edited and deleted search results
      * @param int $results_per_block the maximum number of results that can
      *      be returned by a findDocsWithWord call
+     * @param int $direction when results are access from $index_name in
+     *      which order they should be presented. self::ASCENDING is from first
+     *      added to last added, self::DESCENDING is from last added to first
+     *      added. Note: this value is not saved permanently. So you
+     *      could in theory open two read only versions of the same bundle but
+     *      reading the results in different directions
      */
     public function __construct($word_key, $shift, $index_name, $raw = false,
         $filter = null, $results_per_block =
-        IndexBundleIterator::RESULTS_PER_BLOCK)
+        IndexBundleIterator::RESULTS_PER_BLOCK, $direction=self::ASCENDING)
     {
         if ($raw == false) {
             //get rid of out modified base64 encoding
             $word_key = L\unbase64Hash($word_key);
         }
+        $this->direction = $direction;
         $this->filter = $filter;
         $this->word_key = $word_key;
         $this->shift = $shift;
-        $this->index_name =  $index_name;
+        $this->index_name = $index_name;
         list($this->num_docs, $this->dictionary_info) =
             IndexManager::getWordInfo($index_name, $word_key, $shift,
             -1, -1, C\NUM_DISTINCT_GENERATIONS, true);
@@ -181,11 +188,20 @@ class WordIterator extends IndexBundleIterator
         $this->current_doc_offset = null;
         $this->results_per_block = $results_per_block;
         $this->current_block_fresh = false;
-        $this->start_generation = 0;
+        if ($direction == self::ASCENDING)
+        $this->start_generation = ($direction == self::ASCENDING) ? 0 :
+            $this->num_generations - 1;
         if ($this->dictionary_info !== false) {
             $this->reset();
         }
     }
+    /**
+     *
+     */
+    public function getDirection()
+    {
+        return $this->direction;
+    }
     /**
      * Resets the iterator to the first document block that it could iterate
      * over
@@ -204,16 +220,26 @@ class WordIterator extends IndexBundleIterator
                 $this->no_more_generations =
                     ($this->num_generations < C\NUM_DISTINCT_GENERATIONS);
             }
+            $info = ($this->direction == self::ASCENDING) ?
+                $this->dictionary_info[0] : $this->dictionary_info[
+                $this->num_generations - 1];
             list($this->current_generation, $this->start_offset,
-                $this->last_offset, )
-                = $this->dictionary_info[0];
+                $this->last_offset, ) = $info;
         } else {
             $this->start_offset = 0;
             $this->last_offset = -1;
             $this->num_generations = -1;
         }
-        $this->current_offset = $this->start_offset;
-        $this->generation_pointer = 0;
+        if ($this->direction == self::ASCENDING) {
+            $this->current_offset = $this->start_offset;
+            $this->generation_pointer = 0;
+        } else {
+            $this->current_offset = $this->last_offset;
+            /*  reset pointer to the number of gens, which in reverse is the
+               first one we want
+             */
+            $this->generation_pointer = $this->num_generations - 1;
+        }
         $this->count_block = 0;
         $this->seen_docs = 0;
         $this->current_doc_offset = null;
@@ -229,9 +255,18 @@ class WordIterator extends IndexBundleIterator
         if ($this->empty) {
             return -1;
         }
-        if ($this->generation_pointer == $this->num_generations - 1 &&
-            $this->current_offset > $this->last_offset) {
-            return -1;
+        $ascending = ($this->direction == self::ASCENDING);
+        if ($ascending) {
+            if ($this->generation_pointer == $this->num_generations - 1 &&
+                $this->current_offset > $this->last_offset) {
+                return -1;
+            }
+        } else {
+            if (($this->generation_pointer >= $this->num_generations)
+                || ($this->generation_pointer == 0 &&
+                $this->current_offset < $this->start_offset)) {
+                return -1;
+            }
         }
         $pre_results = [];
         if (!$this->empty) {
@@ -242,7 +277,7 @@ class WordIterator extends IndexBundleIterator
             $shard = $index->getCurrentShard();
             $pre_results = $shard->getPostingsSlice($this->start_offset,
                 $this->next_offset, $this->last_offset,
-                $this->results_per_block);
+                $this->results_per_block, $this->direction);
         }
         $results = [];
         $doc_key_len = IndexShard::DOC_KEY_LEN;
@@ -277,12 +312,27 @@ class WordIterator extends IndexBundleIterator
     public function advanceSeenDocs()
     {
         if ($this->current_block_fresh != true) {
-            $num_docs = min($this->results_per_block,
-                IndexShard::numDocsOrLinks($this->next_offset,
-                    $this->last_offset));
+            if ($this->direction == self::ASCENDING) {
+                $num_docs = min($this->results_per_block,
+                    IndexShard::numDocsOrLinks($this->next_offset,
+                        $this->last_offset));
+                $delta_sign = 1;
+            } else {
+                $total_guess = IndexShard::numDocsOrLinks($this->next_offset,
+                        $this->start_offset);
+                $num_docs = $total_guess % $this->results_per_block;
+                if ($num_docs == 0) {
+                    $num_docs = $this->results_per_block;
+                } else {
+                    $num_docs = IndexShard::numDocsOrLinks($this->start_offset,
+                        $this->last_offset) % $this->results_per_block;
+                }
+                $delta_sign = -1;
+            }
             $this->next_offset = $this->current_offset;
-            $this->next_offset += IndexShard::POSTING_LEN * $num_docs;
-            if ($num_docs < 0) {
+            $this->next_offset += $delta_sign *
+                IndexShard::POSTING_LEN * $num_docs;
+            if ($num_docs <= 0) {
                 return;
             }
         } else {
@@ -304,24 +354,33 @@ class WordIterator extends IndexBundleIterator
             $this->plainAdvance();
             return;
         }
+        $is_ascending = ($this->direction == self::ASCENDING);
         $cur_gen_doc_offset = $this->currentGenDocOffsetWithWord();
         if ($cur_gen_doc_offset == -1 ||
             $this->genDocOffsetCmp($cur_gen_doc_offset,
-            $gen_doc_offset) >= 0) {
+            $gen_doc_offset, $this->direction) >= 0) {
             return;
         }
         $this->plainAdvance();
-        if ($this->current_generation < $gen_doc_offset[0]) {
+        $advance_check = ($is_ascending) ?
+            ($this->current_generation < $gen_doc_offset[0]) :
+            ($this->current_generation > $gen_doc_offset[0]);
+        if ($advance_check) {
             $this->advanceGeneration($gen_doc_offset[0]);
             $this->next_offset = $this->current_offset;
         }
         $index = IndexManager::getIndex($this->index_name);
         $index->setCurrentShard($this->current_generation, true);
         $shard = $index->getCurrentShard();
-        $last = $this->last_offset;
+        if ($is_ascending) {
+            $end_point = $this->last_offset;
+        } else {
+            $end_point = $this->start_offset;
+        }
         if ($this->current_generation == $gen_doc_offset[0]) {
             $offset_pair = $shard->nextPostingOffsetDocOffset(
-                $this->next_offset, $last, $gen_doc_offset[1]);
+                $this->next_offset, $end_point, $gen_doc_offset[1],
+                $this->direction);
             if ($offset_pair === false) {
                 $this->advanceGeneration();
                 $this->next_offset = $this->current_offset;
@@ -341,13 +400,20 @@ class WordIterator extends IndexBundleIterator
     {
         $this->advanceSeenDocs();
         $this->current_doc_offset = null;
-        if ($this->current_offset < $this->next_offset) {
+        $is_ascending = ($this->direction == self::ASCENDING);
+        $update_check = ($is_ascending) ?
+            ($this->current_offset < $this->next_offset) :
+            ($this->current_offset > $this->next_offset);
+        if ($update_check) {
             $this->current_offset = $this->next_offset;
         } else {
             $this->advanceGeneration();
             $this->next_offset = $this->current_offset;
         }
-        if ($this->current_offset > $this->last_offset) {
+        $update_check = ($is_ascending) ?
+            ($this->current_offset > $this->last_offset) :
+            ($this->current_offset < $this->start_offset);
+        if ($update_check) {
             $this->advanceGeneration();
             $this->next_offset = $this->current_offset;
         }
@@ -363,38 +429,63 @@ class WordIterator extends IndexBundleIterator
         if ($generation === null) {
             $generation = $this->current_generation;
         }
+        $is_ascending = ($this->direction == self::ASCENDING);
         do {
-            if ($this->generation_pointer < $this->num_generations) {
-                $this->generation_pointer++;
+            $gen_check = ($is_ascending) ?
+                ($this->generation_pointer < $this->num_generations) :
+                ($this->generation_pointer >= 0);
+            if ($gen_check) {
+                if ($is_ascending) {
+                    $this->generation_pointer++;
+                } else {
+                    $this->generation_pointer--;
+                }
             }
-            if ($this->generation_pointer < $this->num_generations) {
+            $gen_check = ($is_ascending) ?
+                $this->generation_pointer < $this->num_generations :
+                $this->generation_pointer >= 0;
+            if ($gen_check) {
                 list($this->current_generation, $this->start_offset,
                     $this->last_offset, )
                     = $this->dictionary_info[$this->generation_pointer];
-                $this->current_offset = $this->start_offset;
+                $this->current_offset = ($is_ascending) ? $this->start_offset:
+                    $this->last_offset;
             }
-            if (!$this->no_more_generations &&
-                $this->current_generation < $generation &&
-                $this->generation_pointer >= $this->num_generations) {
-                list($estimated_remaining_total, $info) =
-                    IndexManager::getWordInfo($this->index_name,
-                    $this->word_key, 0, -1, $this->num_generations,
-                    C\NUM_DISTINCT_GENERATIONS, true);
-                if (count($info) > 0) {
-                    $this->num_docs = $this->seen_docs +
-                        $estimated_remaining_total;
-                    ksort($info);
-                    $this->dictionary_info = array_merge($this->dictionary_info,
-                        array_values($info));
-                    $this->num_generations = count($this->dictionary_info);
-                    $this->no_more_generations =
-                        count($info) < C\NUM_DISTINCT_GENERATIONS;
-                    //will increment back to where were next loop
-                    $this->generation_pointer--;
+            if (!$this->no_more_generations) {
+                $gen_check = ($is_ascending) ?
+                    ($this->current_generation < $generation &&
+                    $this->generation_pointer >= $this->num_generations) :
+                    ($this->current_generation > $generation &&
+                    $this->generation_pointer <= 0);
+                if ($gen_check) {
+                    list($estimated_remaining_total, $info) =
+                        IndexManager::getWordInfo($this->index_name,
+                        $this->word_key, 0, -1, $this->num_generations,
+                        C\NUM_DISTINCT_GENERATIONS, true);
+                    if (count($info) > 0) {
+                        $this->num_docs = $this->seen_docs +
+                            $estimated_remaining_total;
+                        ksort($info);
+                        $this->dictionary_info = array_merge(
+                            $this->dictionary_info, array_values($info));
+                        $this->num_generations = count($this->dictionary_info);
+                        $this->no_more_generations =
+                            count($info) < C\NUM_DISTINCT_GENERATIONS;
+                        //will increment back to where were next loop
+                        if ($is_ascending) {
+                            $this->generation_pointer--;
+                        } else {
+                            $this->generation_pointer++;
+                        }
+                    }
                 }
             }
-        } while($this->current_generation < $generation &&
-            $this->generation_pointer < $this->num_generations);
+            $gen_check = ($is_ascending) ?
+                ($this->current_generation < $generation &&
+                $this->generation_pointer < $this->num_generations) :
+                ($this->current_generation > $generation &&
+                $this->generation_pointer >= 0);
+        } while($gen_check);
     }
     /**
      * Gets the doc_offset and generation for the next document that
@@ -408,8 +499,13 @@ class WordIterator extends IndexBundleIterator
         if ($this->current_doc_offset !== null) {
             return [$this->current_generation, $this->current_doc_offset];
         }
-        if ($this->current_offset > $this->last_offset ||
-            $this->generation_pointer >= $this->num_generations) {
+        $is_ascending = ($this->direction == self::ASCENDING);
+        $offset_check = ($is_ascending) ?
+            ($this->current_offset > $this->last_offset ||
+            $this->generation_pointer >= $this->num_generations) :
+            ($this->current_offset < $this->start_offset||
+            $this->generation_pointer <= -1);
+        if ($offset_check) {
             return -1;
         }
         $index = IndexManager::getIndex($this->index_name);
diff --git a/src/library/media_jobs/FeedsUpdateJob.php b/src/library/media_jobs/FeedsUpdateJob.php
index ad067906e..b08b57346 100644
--- a/src/library/media_jobs/FeedsUpdateJob.php
+++ b/src/library/media_jobs/FeedsUpdateJob.php
@@ -606,9 +606,8 @@ class FeedsUpdateJob extends MediaJob
         $prune_shard_name = C\WORK_DIRECTORY . "/feeds/prune_index";
         $dir = C\CRAWL_DIR . '/cache/' . self::feed_index_data_base_name;
         $info['DESCRIPTION'] = "feed";
-        $info[self::DIRECTION] = self::BACKWARD;
         $index_archive = new IndexArchiveBundle($dir, false,
-            serialize($info), C\NUM_DOCS_PER_GENERATION);
+            serialize($info), C\NUM_DOCS_PER_GENERATION, self::DESCENDING);
         $this->db->setWorldPermissionsRecursive($dir);
         $prune_shard = new IndexShard($prune_shard_name);
         $too_old = $time - $age;
diff --git a/src/locale/ar/configure.ini b/src/locale/ar/configure.ini
index bb0bec899..c7dd4168a 100755
--- a/src/locale/ar/configure.ini
+++ b/src/locale/ar/configure.ini
@@ -335,6 +335,9 @@ social_component_num_results = "عدد من النتائج"
 social_component_del_frag = ""
 social_component_weight = "الوزن"
 social_component_name = ""
+social_component_order = ""
+social_component_ascending = ""
+social_component_descending = ""
 social_component_add_keywords = ""
 social_component_actions = "إجراءات"
 social_component_add_query = "إضافة استعلام"
@@ -1605,6 +1608,8 @@ mixcrawls_element_available_mixes = "يمزج المتاحة"
 mixcrawls_view_name = "الاسم"
 mixcrawls_view_definition = "تعريف"
 mixcrawls_view_actions = "إجراءات"
+mixcrawls_view_ascending = ""
+mixcrawls_view_descending = ""
 mixcrawls_view_no_components = "مزيج لم أية مكونات"
 mixcrawls_view_edit = "تحرير"
 mixcrawls_set_index = "تعيين كفهرس"
diff --git a/src/locale/bn/configure.ini b/src/locale/bn/configure.ini
index f0e4d09b9..35362a452 100755
--- a/src/locale/bn/configure.ini
+++ b/src/locale/bn/configure.ini
@@ -335,6 +335,9 @@ social_component_num_results = ""
 social_component_del_frag = ""
 social_component_weight = ""
 social_component_name = ""
+social_component_order = ""
+social_component_ascending = ""
+social_component_descending = ""
 social_component_add_keywords = ""
 social_component_actions = ""
 social_component_add_query = ""
@@ -1605,6 +1608,8 @@ mixcrawls_element_available_mixes = ""
 mixcrawls_view_name = ""
 mixcrawls_view_definition = ""
 mixcrawls_view_actions = ""
+mixcrawls_view_ascending = ""
+mixcrawls_view_descending = ""
 mixcrawls_view_no_components = ""
 mixcrawls_view_edit = ""
 mixcrawls_set_index = ""
diff --git a/src/locale/de/configure.ini b/src/locale/de/configure.ini
index e828a61a7..4ecc9b7e2 100755
--- a/src/locale/de/configure.ini
+++ b/src/locale/de/configure.ini
@@ -335,6 +335,9 @@ social_component_num_results = ""
 social_component_del_frag = ""
 social_component_weight = ""
 social_component_name = ""
+social_component_order = ""
+social_component_ascending = ""
+social_component_descending = ""
 social_component_add_keywords = ""
 social_component_actions = ""
 social_component_add_query = ""
@@ -1605,6 +1608,8 @@ mixcrawls_element_available_mixes = ""
 mixcrawls_view_name = ""
 mixcrawls_view_definition = ""
 mixcrawls_view_actions = ""
+mixcrawls_view_ascending = ""
+mixcrawls_view_descending = ""
 mixcrawls_view_no_components = ""
 mixcrawls_view_edit = ""
 mixcrawls_set_index = ""
diff --git a/src/locale/en_US/configure.ini b/src/locale/en_US/configure.ini
index d0a4a5dd4..5eb6404a3 100644
--- a/src/locale/en_US/configure.ini
+++ b/src/locale/en_US/configure.ini
@@ -335,6 +335,9 @@ social_component_num_results = "Results Shown"
 social_component_del_frag = "Remove"
 social_component_weight = "Weight"
 social_component_name = "Name"
+social_component_order = "Order"
+social_component_ascending = "Ascending"
+social_component_descending = "Descending"
 social_component_add_keywords = "Keywords"
 social_component_actions = "Actions"
 social_component_add_query = "Add Query"
@@ -1605,6 +1608,8 @@ mixcrawls_element_available_mixes = "Mixes"
 mixcrawls_view_name = "Name"
 mixcrawls_view_definition = "Definition"
 mixcrawls_view_actions = "Actions"
+mixcrawls_view_ascending = "ASC"
+mixcrawls_view_descending = "DESC"
 mixcrawls_view_no_components = "Mix has no components yet"
 mixcrawls_view_edit = "Edit"
 mixcrawls_set_index = "Set as Index"
diff --git a/src/locale/es/configure.ini b/src/locale/es/configure.ini
index 1319a8d0f..416ab87a1 100755
--- a/src/locale/es/configure.ini
+++ b/src/locale/es/configure.ini
@@ -335,6 +335,9 @@ social_component_num_results = "N&uacute;mero de Resultados"
 social_component_del_frag = ""
 social_component_weight = "Tama&ntilde;o"
 social_component_name = ""
+social_component_order = ""
+social_component_ascending = ""
+social_component_descending = ""
 social_component_add_keywords = ""
 social_component_actions = "Acciones"
 social_component_add_query = "Agregar consulta"
@@ -1605,6 +1608,8 @@ mixcrawls_element_available_mixes = ""
 mixcrawls_view_name = ""
 mixcrawls_view_definition = ""
 mixcrawls_view_actions = ""
+mixcrawls_view_ascending = ""
+mixcrawls_view_descending = ""
 mixcrawls_view_no_components = ""
 mixcrawls_view_edit = ""
 mixcrawls_set_index = ""
diff --git a/src/locale/fa/configure.ini b/src/locale/fa/configure.ini
index 3d404ca7f..1e30f1801 100755
--- a/src/locale/fa/configure.ini
+++ b/src/locale/fa/configure.ini
@@ -335,6 +335,9 @@ social_component_num_results = "تعداد نتایج"
 social_component_del_frag = ""
 social_component_weight = "وزن"
 social_component_name = ""
+social_component_order = ""
+social_component_ascending = ""
+social_component_descending = ""
 social_component_add_keywords = ""
 social_component_actions = "فرمان&zwnj;ها"
 social_component_add_query = "پُرسمان اضافه کن"
@@ -1605,6 +1608,8 @@ mixcrawls_element_available_mixes = "ترکیب&zwnj;های موجود"
 mixcrawls_view_name = "نام"
 mixcrawls_view_definition = "تعریف"
 mixcrawls_view_actions = "فرمان&zwnj;ها"
+mixcrawls_view_ascending = ""
+mixcrawls_view_descending = ""
 mixcrawls_view_no_components = "ترکیب هنوز هیچ جزئی ندارد"
 mixcrawls_view_edit = "ویرایش"
 mixcrawls_set_index = "برای نمایه قرار بده"
diff --git a/src/locale/fr_FR/configure.ini b/src/locale/fr_FR/configure.ini
index 4aea36a46..8ef5dfd51 100755
--- a/src/locale/fr_FR/configure.ini
+++ b/src/locale/fr_FR/configure.ini
@@ -335,6 +335,9 @@ social_component_num_results = ""
 social_component_del_frag = ""
 social_component_weight = ""
 social_component_name = ""
+social_component_order = ""
+social_component_ascending = ""
+social_component_descending = ""
 social_component_add_keywords = ""
 social_component_actions = ""
 social_component_add_query = ""
@@ -1605,6 +1608,8 @@ mixcrawls_element_available_mixes = ""
 mixcrawls_view_name = ""
 mixcrawls_view_definition = ""
 mixcrawls_view_actions = ""
+mixcrawls_view_ascending = ""
+mixcrawls_view_descending = ""
 mixcrawls_view_no_components = ""
 mixcrawls_view_edit = ""
 mixcrawls_set_index = ""
diff --git a/src/locale/he/configure.ini b/src/locale/he/configure.ini
index a96de60e3..d1c15118a 100755
--- a/src/locale/he/configure.ini
+++ b/src/locale/he/configure.ini
@@ -335,6 +335,9 @@ social_component_num_results = ""
 social_component_del_frag = ""
 social_component_weight = ""
 social_component_name = ""
+social_component_order = ""
+social_component_ascending = ""
+social_component_descending = ""
 social_component_add_keywords = ""
 social_component_actions = ""
 social_component_add_query = ""
@@ -1605,6 +1608,8 @@ mixcrawls_element_available_mixes = ""
 mixcrawls_view_name = ""
 mixcrawls_view_definition = ""
 mixcrawls_view_actions = ""
+mixcrawls_view_ascending = ""
+mixcrawls_view_descending = ""
 mixcrawls_view_no_components = ""
 mixcrawls_view_edit = ""
 mixcrawls_set_index = ""
diff --git a/src/locale/hi/configure.ini b/src/locale/hi/configure.ini
index a04b25daf..646a844de 100755
--- a/src/locale/hi/configure.ini
+++ b/src/locale/hi/configure.ini
@@ -335,6 +335,9 @@ social_component_num_results = ""
 social_component_del_frag = ""
 social_component_weight = ""
 social_component_name = ""
+social_component_order = ""
+social_component_ascending = ""
+social_component_descending = ""
 social_component_add_keywords = ""
 social_component_actions = ""
 social_component_add_query = ""
@@ -1605,6 +1608,8 @@ mixcrawls_element_available_mixes = ""
 mixcrawls_view_name = ""
 mixcrawls_view_definition = ""
 mixcrawls_view_actions = ""
+mixcrawls_view_ascending = ""
+mixcrawls_view_descending = ""
 mixcrawls_view_no_components = ""
 mixcrawls_view_edit = ""
 mixcrawls_set_index = ""
diff --git a/src/locale/in_ID/configure.ini b/src/locale/in_ID/configure.ini
index 80cee686d..b1d16423c 100755
--- a/src/locale/in_ID/configure.ini
+++ b/src/locale/in_ID/configure.ini
@@ -335,6 +335,9 @@ social_component_num_results = ""
 social_component_del_frag = ""
 social_component_weight = ""
 social_component_name = ""
+social_component_order = ""
+social_component_ascending = ""
+social_component_descending = ""
 social_component_add_keywords = ""
 social_component_actions = ""
 social_component_add_query = ""
@@ -1605,6 +1608,8 @@ mixcrawls_element_available_mixes = ""
 mixcrawls_view_name = ""
 mixcrawls_view_definition = ""
 mixcrawls_view_actions = ""
+mixcrawls_view_ascending = ""
+mixcrawls_view_descending = ""
 mixcrawls_view_no_components = ""
 mixcrawls_view_edit = ""
 mixcrawls_set_index = ""
diff --git a/src/locale/it/configure.ini b/src/locale/it/configure.ini
index bc58f102e..0198f96cf 100755
--- a/src/locale/it/configure.ini
+++ b/src/locale/it/configure.ini
@@ -335,6 +335,9 @@ social_component_num_results = "Numero di risultati"
 social_component_del_frag = ""
 social_component_weight = "Peso"
 social_component_name = ""
+social_component_order = ""
+social_component_ascending = ""
+social_component_descending = ""
 social_component_add_keywords = ""
 social_component_actions = "Azioni"
 social_component_add_query = "Aggiungi Ricerca"
@@ -1605,6 +1608,8 @@ mixcrawls_element_available_mixes = "Unioni disponibili"
 mixcrawls_view_name = "Nome"
 mixcrawls_view_definition = "Definizione"
 mixcrawls_view_actions = "Azioni"
+mixcrawls_view_ascending = ""
+mixcrawls_view_descending = ""
 mixcrawls_view_no_components = "L&#039;Unione non ha ancora componenti"
 mixcrawls_view_edit = "Modifica"
 mixcrawls_set_index = "Usa come Indice"
diff --git a/src/locale/ja/configure.ini b/src/locale/ja/configure.ini
index cf0b0ce37..8afb4539e 100755
--- a/src/locale/ja/configure.ini
+++ b/src/locale/ja/configure.ini
@@ -335,6 +335,9 @@ social_component_num_results = ""
 social_component_del_frag = ""
 social_component_weight = ""
 social_component_name = ""
+social_component_order = ""
+social_component_ascending = ""
+social_component_descending = ""
 social_component_add_keywords = ""
 social_component_actions = ""
 social_component_add_query = ""
@@ -1605,6 +1608,8 @@ mixcrawls_element_available_mixes = ""
 mixcrawls_view_name = ""
 mixcrawls_view_definition = ""
 mixcrawls_view_actions = ""
+mixcrawls_view_ascending = ""
+mixcrawls_view_descending = ""
 mixcrawls_view_no_components = ""
 mixcrawls_view_edit = ""
 mixcrawls_set_index = ""
diff --git a/src/locale/kn/configure.ini b/src/locale/kn/configure.ini
index 278eb5121..8ca931740 100755
--- a/src/locale/kn/configure.ini
+++ b/src/locale/kn/configure.ini
@@ -335,6 +335,9 @@ social_component_num_results = "ಫಲಿತಾಂಶಗಳ ಸಂಖ್ಯೆ"
 social_component_del_frag = ""
 social_component_weight = "ಗೌರವ"
 social_component_name = ""
+social_component_order = ""
+social_component_ascending = ""
+social_component_descending = ""
 social_component_add_keywords = ""
 social_component_actions = "ಕ್ರಿಯೆಗಳು"
 social_component_add_query = "ಪ್ರಶ್ನೆಯನ್ನು ಸೇರಿಸು"
@@ -1605,6 +1608,8 @@ mixcrawls_element_available_mixes = ""
 mixcrawls_view_name = ""
 mixcrawls_view_definition = ""
 mixcrawls_view_actions = ""
+mixcrawls_view_ascending = ""
+mixcrawls_view_descending = ""
 mixcrawls_view_no_components = ""
 mixcrawls_view_edit = ""
 mixcrawls_set_index = ""
diff --git a/src/locale/ko/configure.ini b/src/locale/ko/configure.ini
index 45105c7cd..57f653260 100755
--- a/src/locale/ko/configure.ini
+++ b/src/locale/ko/configure.ini
@@ -335,6 +335,9 @@ social_component_num_results = ""
 social_component_del_frag = ""
 social_component_weight = ""
 social_component_name = ""
+social_component_order = ""
+social_component_ascending = ""
+social_component_descending = ""
 social_component_add_keywords = ""
 social_component_actions = ""
 social_component_add_query = ""
@@ -1605,6 +1608,8 @@ mixcrawls_element_available_mixes = ""
 mixcrawls_view_name = ""
 mixcrawls_view_definition = ""
 mixcrawls_view_actions = ""
+mixcrawls_view_ascending = ""
+mixcrawls_view_descending = ""
 mixcrawls_view_no_components = ""
 mixcrawls_view_edit = ""
 mixcrawls_set_index = ""
diff --git a/src/locale/nl/configure.ini b/src/locale/nl/configure.ini
index 53b7146e8..1d19b99d8 100644
--- a/src/locale/nl/configure.ini
+++ b/src/locale/nl/configure.ini
@@ -335,6 +335,9 @@ social_component_num_results = "resultaten getoond"
 social_component_del_frag = "verwijderen"
 social_component_weight = "gewicht"
 social_component_name = "naam"
+social_component_order = ""
+social_component_ascending = ""
+social_component_descending = ""
 social_component_add_keywords = "trefwoorden"
 social_component_actions = "acties"
 social_component_add_query = "Zoekopdracht toevoegen"
@@ -1605,6 +1608,8 @@ mixcrawls_element_available_mixes = "beschikbaar Mixes"
 mixcrawls_view_name = "naam"
 mixcrawls_view_definition = "definitie"
 mixcrawls_view_actions = "acties"
+mixcrawls_view_ascending = ""
+mixcrawls_view_descending = ""
 mixcrawls_view_no_components = "Mix heeft nog geen componenten"
 mixcrawls_view_edit = "uitgeven"
 mixcrawls_set_index = "Instellen als Index"
diff --git a/src/locale/pl/configure.ini b/src/locale/pl/configure.ini
index f59364fbb..8fd5db1dc 100755
--- a/src/locale/pl/configure.ini
+++ b/src/locale/pl/configure.ini
@@ -335,6 +335,9 @@ social_component_num_results = ""
 social_component_del_frag = ""
 social_component_weight = ""
 social_component_name = ""
+social_component_order = ""
+social_component_ascending = ""
+social_component_descending = ""
 social_component_add_keywords = ""
 social_component_actions = ""
 social_component_add_query = ""
@@ -1605,6 +1608,8 @@ mixcrawls_element_available_mixes = ""
 mixcrawls_view_name = ""
 mixcrawls_view_definition = ""
 mixcrawls_view_actions = ""
+mixcrawls_view_ascending = ""
+mixcrawls_view_descending = ""
 mixcrawls_view_no_components = ""
 mixcrawls_view_edit = ""
 mixcrawls_set_index = ""
diff --git a/src/locale/pt/configure.ini b/src/locale/pt/configure.ini
index eaf93a394..7ed4a1ef6 100755
--- a/src/locale/pt/configure.ini
+++ b/src/locale/pt/configure.ini
@@ -335,6 +335,9 @@ social_component_num_results = ""
 social_component_del_frag = ""
 social_component_weight = ""
 social_component_name = ""
+social_component_order = ""
+social_component_ascending = ""
+social_component_descending = ""
 social_component_add_keywords = ""
 social_component_actions = ""
 social_component_add_query = ""
@@ -1605,6 +1608,8 @@ mixcrawls_element_available_mixes = ""
 mixcrawls_view_name = ""
 mixcrawls_view_definition = ""
 mixcrawls_view_actions = ""
+mixcrawls_view_ascending = ""
+mixcrawls_view_descending = ""
 mixcrawls_view_no_components = ""
 mixcrawls_view_edit = ""
 mixcrawls_set_index = ""
diff --git a/src/locale/ru/configure.ini b/src/locale/ru/configure.ini
index e6306a324..548273d2a 100755
--- a/src/locale/ru/configure.ini
+++ b/src/locale/ru/configure.ini
@@ -335,6 +335,9 @@ social_component_num_results = ""
 social_component_del_frag = ""
 social_component_weight = ""
 social_component_name = ""
+social_component_order = ""
+social_component_ascending = ""
+social_component_descending = ""
 social_component_add_keywords = ""
 social_component_actions = ""
 social_component_add_query = ""
@@ -1605,6 +1608,8 @@ mixcrawls_element_available_mixes = ""
 mixcrawls_view_name = ""
 mixcrawls_view_definition = ""
 mixcrawls_view_actions = ""
+mixcrawls_view_ascending = ""
+mixcrawls_view_descending = ""
 mixcrawls_view_no_components = ""
 mixcrawls_view_edit = ""
 mixcrawls_set_index = ""
diff --git a/src/locale/te/configure.ini b/src/locale/te/configure.ini
index fb32832d9..111582bde 100644
--- a/src/locale/te/configure.ini
+++ b/src/locale/te/configure.ini
@@ -335,6 +335,9 @@ social_component_num_results = "ఫలితాలను చూపించా
 social_component_del_frag = "తొలగించు"
 social_component_weight = "బరువు"
 social_component_name = "పేరు "
+social_component_order = ""
+social_component_ascending = ""
+social_component_descending = ""
 social_component_add_keywords = "కీ పదాలు"
 social_component_actions = "యాక్సన్ లు"
 social_component_add_query = "క్వెరి జోడించుము"
@@ -1605,6 +1608,8 @@ mixcrawls_element_available_mixes = "లభ్యంఅయ్యే మిక్
 mixcrawls_view_name = "పేరు"
 mixcrawls_view_definition = "నిర్వచనం"
 mixcrawls_view_actions = "చర్యలు"
+mixcrawls_view_ascending = ""
+mixcrawls_view_descending = ""
 mixcrawls_view_no_components = ""
 mixcrawls_view_edit = "ఎడిట్"
 mixcrawls_set_index = ""
diff --git a/src/locale/th/configure.ini b/src/locale/th/configure.ini
index 2bb9935f9..d12b2ea56 100755
--- a/src/locale/th/configure.ini
+++ b/src/locale/th/configure.ini
@@ -335,6 +335,9 @@ social_component_num_results = ""
 social_component_del_frag = ""
 social_component_weight = ""
 social_component_name = ""
+social_component_order = ""
+social_component_ascending = ""
+social_component_descending = ""
 social_component_add_keywords = ""
 social_component_actions = ""
 social_component_add_query = ""
@@ -1605,6 +1608,8 @@ mixcrawls_element_available_mixes = ""
 mixcrawls_view_name = ""
 mixcrawls_view_definition = ""
 mixcrawls_view_actions = ""
+mixcrawls_view_ascending = ""
+mixcrawls_view_descending = ""
 mixcrawls_view_no_components = ""
 mixcrawls_view_edit = ""
 mixcrawls_set_index = ""
diff --git a/src/locale/tr/configure.ini b/src/locale/tr/configure.ini
index 8c95ebd85..8e70eef27 100755
--- a/src/locale/tr/configure.ini
+++ b/src/locale/tr/configure.ini
@@ -335,6 +335,9 @@ social_component_num_results = ""
 social_component_del_frag = ""
 social_component_weight = ""
 social_component_name = ""
+social_component_order = ""
+social_component_ascending = ""
+social_component_descending = ""
 social_component_add_keywords = ""
 social_component_actions = ""
 social_component_add_query = ""
@@ -1605,6 +1608,8 @@ mixcrawls_element_available_mixes = ""
 mixcrawls_view_name = ""
 mixcrawls_view_definition = ""
 mixcrawls_view_actions = ""
+mixcrawls_view_ascending = ""
+mixcrawls_view_descending = ""
 mixcrawls_view_no_components = ""
 mixcrawls_view_edit = ""
 mixcrawls_set_index = ""
diff --git a/src/locale/vi_VN/configure.ini b/src/locale/vi_VN/configure.ini
index 1eb5db270..8b708a342 100755
--- a/src/locale/vi_VN/configure.ini
+++ b/src/locale/vi_VN/configure.ini
@@ -335,6 +335,9 @@ social_component_num_results = "Số kết quả"
 social_component_del_frag = ""
 social_component_weight = "Trọng lượng"
 social_component_name = ""
+social_component_order = ""
+social_component_ascending = ""
+social_component_descending = ""
 social_component_add_keywords = ""
 social_component_actions = "H&agrave;nh động"
 social_component_add_query = "Cộng th&ecirc;m truy vấn"
@@ -1605,6 +1608,8 @@ mixcrawls_element_available_mixes = ""
 mixcrawls_view_name = ""
 mixcrawls_view_definition = ""
 mixcrawls_view_actions = ""
+mixcrawls_view_ascending = ""
+mixcrawls_view_descending = ""
 mixcrawls_view_no_components = ""
 mixcrawls_view_edit = ""
 mixcrawls_set_index = ""
diff --git a/src/locale/zh_CN/configure.ini b/src/locale/zh_CN/configure.ini
index 631f5d3a3..104a5b131 100755
--- a/src/locale/zh_CN/configure.ini
+++ b/src/locale/zh_CN/configure.ini
@@ -335,6 +335,9 @@ social_component_num_results = "結果數量"
 social_component_del_frag = ""
 social_component_weight = "元素重量"
 social_component_name = ""
+social_component_order = ""
+social_component_ascending = ""
+social_component_descending = ""
 social_component_add_keywords = ""
 social_component_actions = "元素活動"
 social_component_add_query = "增加查詢"
@@ -1605,6 +1608,8 @@ mixcrawls_element_available_mixes = ""
 mixcrawls_view_name = ""
 mixcrawls_view_definition = ""
 mixcrawls_view_actions = ""
+mixcrawls_view_ascending = ""
+mixcrawls_view_descending = ""
 mixcrawls_view_no_components = ""
 mixcrawls_view_edit = ""
 mixcrawls_set_index = ""
diff --git a/src/models/CrawlModel.php b/src/models/CrawlModel.php
index be5060fa3..665f45e15 100755
--- a/src/models/CrawlModel.php
+++ b/src/models/CrawlModel.php
@@ -278,7 +278,7 @@ class CrawlModel extends ParallelModel
             $mix['FRAGMENTS'][$row['FRAGMENT_ID']]['RESULT_BOUND'] =
                 $row['RESULT_BOUND'];
         }
-        $sql = "SELECT CRAWL_TIMESTAMP, WEIGHT, KEYWORDS ".
+        $sql = "SELECT CRAWL_TIMESTAMP, WEIGHT, DIRECTION, KEYWORDS ".
             " FROM MIX_COMPONENTS WHERE ".
             " TIMESTAMP=:timestamp AND FRAGMENT_ID=:fragment_id";
         $params = [":timestamp" => $timestamp];
@@ -386,10 +386,10 @@ class CrawlModel extends ParallelModel
             $db->execute($sql, [$timestamp, $fid,
                 $fragment_data['RESULT_BOUND']]);
             foreach ($fragment_data['COMPONENTS'] as $component) {
-                $sql = "INSERT INTO MIX_COMPONENTS VALUES (?, ?, ?, ?, ?)";
+                $sql = "INSERT INTO MIX_COMPONENTS VALUES (?, ?, ?, ?, ?, ?)";
                 $db->execute($sql, [$timestamp, $fid,
                     $component['CRAWL_TIMESTAMP'], $component['WEIGHT'],
-                    $component['KEYWORDS']]);
+                    $component['DIRECTION'], $component['KEYWORDS']]);
             }
             $fid++;
         }
@@ -422,7 +422,7 @@ class CrawlModel extends ParallelModel
         $search_controller->clearQuerySavepoint($timestamp);

         $archive_dir = C\WORK_DIRECTORY."/schedules/".
-            self::name_archive_iterator.$timestamp;
+            self::name_archive_iterator . $timestamp;
         if (file_exists($archive_dir)) {
             $this->db->unlinkRecursive($archive_dir);
         }
diff --git a/src/models/ParallelModel.php b/src/models/ParallelModel.php
index 51269b15d..04c37e079 100755
--- a/src/models/ParallelModel.php
+++ b/src/models/ParallelModel.php
@@ -305,7 +305,7 @@ class ParallelModel extends Model
                         list($machine, $key, $index_name, $generation,
                             $summary_offset) = $lookup_item;
                     }
-                    if (strcmp($index_name, "feed") != 0) {
+                    if (strcmp($index_name, "db") != 0) {
                         $index = IndexManager::getIndex($index_name);
                         if (is_integer($summary_offset) &&
                             is_integer($generation)) {
diff --git a/src/models/PhraseModel.php b/src/models/PhraseModel.php
index 2b5cdb604..34f377aa9 100755
--- a/src/models/PhraseModel.php
+++ b/src/models/PhraseModel.php
@@ -158,8 +158,11 @@ class PhraseModel extends ParallelModel
                             if (isset($component['KEYWORDS'])) {
                                 $disjunct_string .= " ".$component['KEYWORDS'];
                             }
-                            $stamp = ($component['CRAWL_TIMESTAMP'] <=  1) ?
-                                "" : " i:".$component['CRAWL_TIMESTAMP'];
+                            $sign = ($component['DIRECTION'] ==
+                                self::ASCENDING) ? "" : "-";
+                            $stamp = ($component['CRAWL_TIMESTAMP'] <=  1) ?"" :
+                                " " . $sign . "i:" .
+                                $component['CRAWL_TIMESTAMP'];
                             $rewrite .= $pipe2.$disjunct_string." w:".
                                 ($component['WEIGHT'] * $base_weight).$stamp;
                             $pipe2 = ' | ';
@@ -722,24 +725,31 @@ class PhraseModel extends ParallelModel
         foreach ($meta_words as $meta_word) {
             $pattern = "/(\s)($meta_word(\S)+)/";
             preg_match_all($pattern, $phrase, $matches);
+            if (empty($matches[2])) {
+                continue;
+            }
             if (!in_array($meta_word,
-                ['i:', 'index:', 'w:', 'weight:', '\-'])) {
+                ['i:', 'index:', '\-i:', '\-index:', 'w:', 'weight:', '\-'])) {
                 $matches = $matches[2];
                 $found_metas = array_merge($found_metas, $matches);
+            } elseif ($meta_word == 'i:' || $meta_word == 'index:' ||
+                $meta_word == '\-i:' || $meta_word == '\-index:') {
+                if (substr($meta_word, 0, 2) == '\-') {
+                    $index_name = substr($matches[2][0],
+                        strlen($meta_word) - 1);
+                    $index_name = "-$index_name";
+                } else {
+                    $index_name = substr($matches[2][0], strlen($meta_word));
+                }
             } elseif ($meta_word == '\-') {
-                if (count($matches[0]) > 0) {
+                if (count($matches[0]) > 0 &&
+                    strpos($matches[0][0], ':') === false) {
                     foreach ($matches[2] as $disallowed) {
                         $disallow_phrases[] = substr($disallowed, 1);
                     }
                 }
-            } elseif ($meta_word == 'i:' || $meta_word == 'index:') {
-                if (isset($matches[2][0])) {
-                    $index_name = substr($matches[2][0], strlen($meta_word));
-                }
             } elseif ($meta_word == 'w:' || $meta_word == 'weight:') {
-                if (isset($matches[2][0])) {
-                    $weight = substr($matches[2][0], strlen($meta_word));
-                }
+                $weight = substr($matches[2][0], strlen($meta_word));
             }
             if (!empty($matches[0]) && is_string($matches[0])
                 && substr($matches[0], 0, 11) == 'media:image') {
@@ -1668,8 +1678,15 @@ class PhraseModel extends ParallelModel
                     }
                     if (in_array(substr($current_key, 0, 9),
                         $doc_iterate_hashes)) {
+                        $actual_index_name = $index_name;
+                        $direction = self::ASCENDING;
+                        if (($index_name[0] == "-")) {
+                            $actual_index_name = substr($index_name, 1);
+                            $direction = self::DESCENDING;
+                        }
                         $word_iterators[$i] = new I\DocIterator(
-                            $index_name, $filter, $to_retrieve);
+                            $actual_index_name, $filter, $to_retrieve,
+                            $direction);
                         $min_group_override = true;
                     } else {
                         //can happen if exact phrase search suffix approach used
@@ -1687,27 +1704,16 @@ class PhraseModel extends ParallelModel
                                 $distinct_key[1] : 0;
                             $distinct_key_id = L\unbase64Hash(
                                 $distinct_key[0]);
-                            $index = IndexManager::getIndex($index_name);
-                            $archive_info = $index->getArchiveInfo(
-                                $index->dir_name);
-                            $description = unserialize(
-                                $archive_info['DESCRIPTION']);
-                            if (isset($description[self::DIRECTION])) {
-                                $direction =
-                                    $description[self::DIRECTION];
-                            } else {
-                                $direction = self::FORWARD;
-                            }
-                            // have to change index name for checking iterator
-                            if ($direction == self::FORWARD) {
-                                $tmp_word_iterators[$m] =
-                                    new I\WordIterator($distinct_key_id, $shift,
-                                    $index_name, true, $filter, $to_retrieve);
-                            } else {
-                                $tmp_word_iterators[$m] = new I\ReverseIterator(
-                                    $distinct_key_id, $shift, $index_name, true,
-                                    $filter, $to_retrieve);
+                            $actual_index_name = $index_name;
+                            $direction = self::ASCENDING;
+                            if (($index_name[0] == "-")) {
+                                $actual_index_name = substr($index_name, 1);
+                                $direction = self::DESCENDING;
                             }
+                            $tmp_word_iterators[$m] =
+                                new I\WordIterator($distinct_key_id, $shift,
+                                $actual_index_name, true, $filter, $to_retrieve,
+                                $direction);
                             $sum += $tmp_word_iterators[$m]->num_docs;
                             if ($tmp_word_iterators[$m]->dictionary_info !=[]) {
                                 $min_group_override = true;
@@ -1736,11 +1742,19 @@ class PhraseModel extends ParallelModel
                 $num_disallow_keys = count($disallow_keys);
                 if ($num_disallow_keys > 0) {
                     for ($i = 0; $i < $num_disallow_keys; $i++) {
+                        $actual_index_name = $index_name;
+                        $direction = self::ASCENDING;
+                        if (($index_name[0] == "-")) {
+                            $actual_index_name = substr($index_name, 1);
+                            $direction = self::DESCENDING;
+                        }
                         /* notice for now shift always 0 - you can't disallow
                            phrases */
                         $disallow_iterator =
                             new I\WordIterator($disallow_keys[$i], 0,
-                                $index_name, false, $filter);
+                                $actual_index_name, false, $filter,
+                                I\IndexBundleIterator::RESULTS_PER_BLOCK,
+                                $direction);
                         $word_iterators[$num_word_keys + $i] =
                             new I\NegationIterator($disallow_iterator);
                     }
diff --git a/src/models/ProfileModel.php b/src/models/ProfileModel.php
index c6b2d3e50..24127d02a 100755
--- a/src/models/ProfileModel.php
+++ b/src/models/ProfileModel.php
@@ -300,7 +300,7 @@ class ProfileModel extends Model
                 TIMESTAMP NUMERIC(" . C\TIMESTAMP_LEN . "),
                 FRAGMENT_ID INTEGER,
                 CRAWL_TIMESTAMP NUMERIC(".C\TIMESTAMP_LEN."), WEIGHT FLOAT,
-                KEYWORDS VARCHAR(" . C\TITLE_LEN . "),
+                DIRECTION INT, KEYWORDS VARCHAR(" . C\TITLE_LEN . "),
                 PRIMARY KEY(TIMESTAMP, FRAGMENT_ID, CRAWL_TIMESTAMP) )",
             "MIX_FRAGMENTS" => "CREATE TABLE MIX_FRAGMENTS (
                 TIMESTAMP NUMERIC(" . C\TIMESTAMP_LEN . "),FRAGMENT_ID INTEGER,
diff --git a/src/scripts/mix.js b/src/scripts/mix.js
index fd2fa6da5..eb1017fc1 100644
--- a/src/scripts/mix.js
+++ b/src/scripts/mix.js
@@ -49,7 +49,7 @@ function drawFragments()
         var rcnt = 0;
         for (var ckey in fragment['components']) {
             var comp = fragment['components'][ckey];
-            drawCrawl(fcnt, rcnt, comp[0], comp[1], comp[2], comp[3]);
+            drawCrawl(fcnt, rcnt, comp[0], comp[1], comp[2], comp[3], comp[4]);
             rcnt++;
         }
         fcnt++;
@@ -110,7 +110,7 @@ function drawFragment(fragment_num, num_results)
  */
 function makeBlankMixTable(tbl, num_fragments, num_results)
 {
-    var tdata = "<tr><td colspan=\"2\"><label for=\"add-crawls-"+num_fragments +
+    var tdata = "<tr><td colspan=\"3\"><label for=\"add-crawls-"+num_fragments +
         "\">"+tl['social_component_add_crawls']+"</label>"+
         drawCrawlSelect(num_fragments)+"</td><td><label for=\"num-results-"+
         num_fragments+"\">"+tl['social_component_num_results']+"</label>"+
@@ -119,6 +119,7 @@ function makeBlankMixTable(tbl, num_fragments, num_results)
             tl['social_component_del_frag']+'</a></td></tr>'+
             "<tr><th>"+tl['social_component_weight']+'</th>'+
             "<th>"+tl['social_component_name']+'</th>'+
+            "<th>"+tl['social_component_order']+'</th>'+
             "<th>"+tl['social_component_add_keywords']+'</th>'+
             "<th>"+tl['social_component_actions']+"</th></tr>";
     tbl.innerHTML = tdata;
@@ -153,7 +154,7 @@ function addCrawlHandler(i)
             var name = ac.options[sel].text;
             var ts = ac.options[sel].value;
             ac.selectedIndex = 0;
-            addCrawl(i, ts, name, 1, "");
+            addCrawl(i, ts, name, 1, 1, "");
         }
 }
 /*
@@ -162,15 +163,16 @@ function addCrawlHandler(i)
  * @param int i crawl fragment to add to
  * @param int ts timestamp of crawl that is being added
  * @param String name name of crawl
- * @param float weight the crawl should ahve within fragment
+ * @param float weight the crawl should have within fragment
+ * @param int direction result from crawl within fragment should have
  * @param String keywords  words to add to search when using this crawl
  */
-function addCrawl(i, ts, name, weight, keywords)
+function addCrawl(i, ts, name, weight, order, keywords)
 {
     var frg = fragments[i]['components'];
     var j = frg.length;
-    fragments[i]['components'][j] = [ts, name, weight, keywords];
-    drawCrawl(i, j, ts, name, weight, keywords)
+    fragments[i]['components'][j] = [ts, name, weight, order, keywords];
+    drawCrawl(i, j, ts, name, weight, order, keywords)
 }
 /*
  * Draws a single crawl within a crawl fragment according to the passed
@@ -180,16 +182,19 @@ function addCrawl(i, ts, name, weight, keywords)
  * @param int j index of crawl that is being added
  * @param int ts timestamp of crawl that is being drawn
  * @param String name name of crawl
+ * @param int order results from crawl within fragment should have
  * @param float weight the crawl should ahve within fragment
+ * @param String keywords  words to add to search when using this crawl
  *
  */
-function drawCrawl(i, j, ts, name, weight, keywords)
+function drawCrawl(i, j, ts, name, weight, order, keywords)
 {
     var tr =document.createElement("tr");
     tr.id = i+"-"+j;
     elt("mix-table-"+i).appendChild(tr);
     tr.innerHTML +=
         "<td>"+drawWeightSelect(i, j, weight)+"</td><td>"+name+
+        "</td><td>"+drawOrderSelect(i, j, order)+
         "</td><td><input type='hidden' name= \"mix[FRAGMENTS]["+i+
         "][COMPONENTS]["+j+"][CRAWL_TIMESTAMP]\"' value=\""+ts+"\" />"+
         "<input title=\""+tl['social_component_add_query']+"\" "+
@@ -257,6 +262,29 @@ function drawWeightSelect(i, j, selected_weight)
     select += "</select>";
     return select;
 }
+/*
+ * Used to draw the select drop down to allow users to select a order of
+ * a given crawl within a crawl fragment should be iterated through at search
+ * time
+ *
+ * @param int i which crawl fragment the crawl belongs to
+ * @param int j which crawl index within the fragment to draw this weight select
+ *     for
+ * @param int selected_order -1 == descending, 1 == ascending
+ */
+function drawOrderSelect(i, j, selected_order)
+{
+    var asc_select = (selected_order == 1) ? " selected='selected' " : "";
+    var desc_select = (selected_order == -1) ? " selected='selected' " : "";
+    var select =
+        "<select name=\'mix[FRAGMENTS]["+i+"][COMPONENTS]["+j+"][DIRECTION]\'>";
+    select += "<option value=\'1\' " + asc_select +">" +
+        tl['social_component_ascending'] + "</option>";
+    select += "<option value=\'-1\' " + desc_select + ">" +
+        tl['social_component_descending'] + "</option>";
+    select += "</select>";
+    return select;
+}
 /*
  * Used to draw the select drop down to allow users to select a crawl to be
  * added to a crawl fragment
diff --git a/src/views/elements/MixcrawlsElement.php b/src/views/elements/MixcrawlsElement.php
index e36b3bb37..a63ac2370 100644
--- a/src/views/elements/MixcrawlsElement.php
+++ b/src/views/elements/MixcrawlsElement.php
@@ -117,19 +117,21 @@ class MixcrawlsElement extends Element
                            count($fragment_data['COMPONENTS']) == 0) {
                            continue;
                         }
-                        e(" #".$fragment_data['RESULT_BOUND']."[");
+                        e(" #".$fragment_data['RESULT_BOUND']."{");
                         $plus = "";
                         foreach ($fragment_data['COMPONENTS'] as
                             $component) {
-                            $crawl_timestamp =
-                            $component['CRAWL_TIMESTAMP'];
+                            $crawl_timestamp = $component['CRAWL_TIMESTAMP'];
+                            $order = ($component['DIRECTION'] > 0) ?
+                                tl('mixcrawls_view_ascending') :
+                                tl('mixcrawls_view_descending');
                             e($plus . $component['WEIGHT']." * (".
                                 $data['available_crawls'][
-                                $crawl_timestamp]." + K:".
+                                $crawl_timestamp]."[$order] + K:".
                                 $component['KEYWORDS'].")");
                             $plus = "<br /> + ";
                         }
-                        e("]<br />");
+                        e("}<br />");
                     }
                 } else {
                     e(tl('mixcrawls_view_no_components'));
diff --git a/tests/IndexShardTest.php b/tests/IndexShardTest.php
index 2d1cf11b3..5b8279838 100644
--- a/tests/IndexShardTest.php
+++ b/tests/IndexShardTest.php
@@ -37,7 +37,6 @@ use seekquarry\yioop\library\IndexShard;
 use seekquarry\yioop\library\LinearAlgebra as LA;
 use seekquarry\yioop\library\UnitTest;
 use seekquarry\yioop\library\index_bundle_iterators\WordIterator;
-use seekquarry\yioop\library\index_bundle_iterators\ReverseIterator;
 use seekquarry\yioop\library\IndexManager;

 /**
@@ -61,7 +60,7 @@ class IndexShardTest extends UnitTest
         $this->test_objects['shard3'] = new IndexShard(C\WORK_DIRECTORY.
             "/shard3.txt", 0);
         $this->test_objects['shard4'] = new IndexShard(C\WORK_DIRECTORY.
-            "/shard4.txt", 0, C\NUM_DOCS_PER_GENERATION, false, false);
+            "/shard4.txt", 0);
     }
     /**
      * Deletes any index shard files we may have created
@@ -151,9 +150,9 @@ class IndexShardTest extends UnitTest
             "Doc lookup by meta word works has correct count");
     }
     /**
-     * Check if can store documents into a reverse index shard and retrieve them
-     * Shard is just a normal regular IndexShard, while Shard4 sets the
-     * additional flag which makes everything go in reverse
+     * Check if can iterate over posting slices in the reverse direction
+     * To do this we construct two identical shards. We go over 'shard'
+     * ascendingly, while we go over 'shard4'  descendingly and compare
      */
     public function addDocumentsGetPostingsSliceReverseTestCase()
     {
@@ -291,92 +290,44 @@ class IndexShardTest extends UnitTest
         $this->assertTrue(isset($forward[$docid]),
             "Doc lookup by word works for shard");
         $backward = $this->test_objects['shard4']->getPostingsSliceById(
-            L\crawlHashWord('the', true), 5);
+            L\crawlHashWord('the', true), 5, IndexShard::DESCENDING);
         $this->assertTrue(isset($backward[$docid]),
             "Doc lookup by word works for shard4");
         $this->assertEqual($forward, $backward,
             "Both only have one document with this word");
         $info = $this->test_objects['shard']->getWordInfo(
             L\crawlHashWord('CCCCCCCC', true), true);
-        list($first_offset, $last_offset,
-                $num_docs_or_links) = $info;
+        list($first_offset, $last_offset, $num_docs_or_links) = $info;
         $this->assertEqual($first_offset, 36,
-            "First offset set correctly");
+            "First posting offset for CCCCCCCC set correctly");
         $this->assertEqual($last_offset, 40,
-            "Second offset set correctly");
+            "Second posting offset for CCCCCCCC set correctly");
+        $this->assertEqual($num_docs_or_links, 2,
+            "Term CCCCCCCC appears in the correct number of documents");
         $forward = $this->test_objects['shard']->nextPostingOffsetDocOffset(
             $first_offset, $last_offset, 5);
+        $this->assertEqual($forward[0], 36,
+            "Search ascending finds correct next posting offset");
         $backward = $this->test_objects['shard4']->nextPostingOffsetDocOffset(
-            $first_offset, $last_offset, 5);
+            $first_offset, $last_offset, 37, IndexShard::DESCENDING);
+        $this->assertEqual($forward[0], 36,
+            "Search descending finds correct next posting offset");
+        /*
+            Now we check posting slices between ascending descending are
+            reversed
+         */
         $forward = $this->test_objects['shard']->getPostingsSlice($first_offset,
-            $first_offset, $last_offset, 5);
+            $first_offset, $last_offset, $num_docs_or_links);
         // have to reset offset values, since getPostingsSlice modifies by ref
         $info = $this->test_objects['shard4']->getWordInfo(
             L\crawlHashWord('CCCCCCCC', true), true);
-        list($first_offset, $last_offset,
-                $num_docs_or_links) = $info;
-        $backward = $this->test_objects['shard4']->getPostingsSlice($first_offset,
-                $last_offset, $last_offset, 5, false);
-        $reversed = array_reverse($backward);
-        $this->assertEqual($forward, $backward,
-            "ReverseIndexShard returns a flipped version off a forward one");
-        $word = "media:news";
-        list($hash_key, $shift) =  L\allCrawlHashPaths($word, true)[0];
-        $index_name = 1573453725;
-        $index_name = 1575422839;
-        $index_archive_name = "IndexData" . $index_name;
-        $index_archive_name = "IndexDataFeed";
-        $index_name = "feed";
-        $results_limit = 200;
-        $total_results = 0;
-        if (file_exists(C\CRAWL_DIR.'/cache/' . $index_archive_name)) {
-            $info = IndexManager::getWordInfo($index_name, $hash_key, $shift,
-                -1, 0, -1);
-            $this->assertTrue(isset($info[0][4]));
-            $forward = [];
-            if (isset($info[0][4])) {
-                $word_iterator = new WordIterator($info[0][4], 0, $index_name,
-                    true, null, $results_limit);
-                $forward_offsets = [];
-                $offset = $word_iterator->currentGenDocOffsetWithWord();
-                array_push($forward_offsets, $offset);
-                while($offset != -1){
-                    $word_iterator->advance();
-                    $offset = $word_iterator->currentGenDocOffsetWithWord();
-                    array_push($forward_offsets, $offset);
-                }
-                foreach ($norm_docs as $k => $v) {
-                    $item['bn'] = $v['bn'];
-                    $item['U'] = $v['U'];
-                    $forward[] = $item;
-                }
-                $for_results = count($forward_offsets);
-            }
-            $backward = [];
-            $info = IndexManager::getWordInfo($index_name, $hash_key, $shift,
-                -1, 0, -1);
-            $this->assertTrue(isset($info[0][4]));
-            if (isset($info[0][4])) {
-                $word_rev_iterator = new ReverseIterator($info[0][4], 0,
-                    $index_name, true, null, $results_limit);
-                $backward_offsets = [];
-                $offset = $word_rev_iterator->currentGenDocOffsetWithWord();
-                array_push($backward_offsets, $offset);
-                while($offset != -1){
-                    $word_rev_iterator->advance();
-                    $offset = $word_rev_iterator->currentGenDocOffsetWithWord();
-                    array_push($backward_offsets, $offset);
-                }
-                $reversed = array_reverse($backward_offsets);
-                foreach ($rev_docs as $k => $v) {
-                    $item['bn'] = $v['bn'];
-                    $item['U'] = $v['U'];
-                    $backward[] = $item;
-                }
-                $backward = array_reverse($backward);
-                $back_results = count($reversed);
-            }
-        }
+        list($first_offset, $last_offset, $num_docs_or_links) = $info;
+        $backward = $this->test_objects['shard4']->getPostingsSlice(
+            $first_offset, $last_offset, $last_offset, $num_docs_or_links,
+            IndexShard::DESCENDING);
+        $this->assertEqual(array_keys($forward),
+            array_reverse(array_keys($backward)),
+            "DESCENDING Slice returns a reversed version off a ASCENDING one");
     }
     /**
      * Check if can store link documents into an index shard and retrieve them