diff --git a/cookbook/memory_management.php b/cookbook/memory_management.php
new file mode 100644
index 0000000..f80e9ce
--- /dev/null
+++ b/cookbook/memory_management.php
@@ -0,0 +1,180 @@
+<?php if (!defined('PmWiki')) exit();
+/*
+  Mainly based on PageFeed by Daniel Roesler (diafygi)
+  http://www.pmwiki.org/wiki/Cookbook/PageFeed  
+  conversation array imported from it
+
+  http://fabien.benetou.fr/Wiki/MemoryRecipe
+
+  TODO
+	support the regex syntax function calls as done in groupkeypages.php
+	clean unused code
+	test with the W3C that feeds generated are proper
+	update recipe date and name
+	transform the default call without argument
+	abstract the date checking function
+		and facilitate any pattern
+			addition, substraction, from list, from math func (e.g. mod), ...
+	note that if backward compability of files is important the 3 formers can remain empty
+		but ideally the local/config.php file should be modified
+	weighting for the composite function should read local PTV
+		if unsset then use the default behavior
+	make the content of description easier to change
+		create a variable at the head of the script
+	ignore empty date field
+		else Unix epoch bug
+
+	! behavior_recall seems to be the most general
+		modify it to accept negative -> support of preparation
+		modify it to accept exp as default -> support of memory-recipe
+*/
+
+## Recipe version information
+$RecipeInfo['MemoryManagement']['Version'] = '2011-06-20';
+
+## Add action for pagefeed
+SDV($HandleActions['memorizationMM'], 'MemorizationMM');
+SDV($HandleActions['recallMM'], 'BehaviorRecallMM');
+SDV($HandleActions['preparationMM'], 'PreparationMM');
+
+# from http://www.pmwiki.org/wiki/PmWiki/Functions
+function FeedTextMM($pagename, &$page, $tag) {
+  $text = RetrieveAuthSection("ReadingNotes.GroupHeader","");
+  $content = MarkupToHTML($pagename, $text);
+  $text = RetrieveAuthSection($pagename, '##Chapter2');
+  $content .= MarkupToHTML($pagename, $text);
+  return "<$tag><![CDATA[$content]]></$tag>";
+}
+
+function MemorizationMM($pagename, $auth = 'read'){ GenerateFeed(title,description,feedfile,timedirection,pattern); }
+function BehaviorRecallMM($pagename, $auth = 'read'){ GenerateFeed(); }
+function PreparationMM($pagename, $auth = 'read'){ GenerateFeed(); }
+
+## Create feed from page history
+function GenerateFeed() {
+# consider defaults : exp, +, ...
+  global $FarmD, $WikiTitle, $ScriptUrl;
+
+  #### location of the resulting feed
+  $feedfile = $FarmD."/pub/memoryfeeds/recallfeed.xml"; #change to a pattern when support arguments
+  #$feedfile = $FarmD."/pub/memoryfeeds/memorizationfeed.xml"; #change to a pattern when support arguments
+  #$feedfile = $FarmD."/pub/memoryfeeds/preparationfeed.xml"; #change to a pattern when support arguments
+  if (!file_exists($feedfile)){
+    if (!touch($feedfile)){
+      print "Creation of the feed file fails, check write permissions for pmWiki and $feedfile.\nMake sure the target directory exists and with the right write permissions.";
+      return;
+    }
+  }
+  # open $feed as read
+  $feed_oldcontent = file_get_contents($feedfile);
+  $feed_newcontent = ''; 
+
+  #### patterns to use
+  $exponential_pattern = array(1,10,30,60,120,350,700,1500,3000,7000,15000,30000,100000); //exp
+  $monthly_pattern = array(1,30,60,90,120,150,180,210,240,270,300); //mod30
+  $weekly_pattern  = array(1,7,14,21,28,35,43,50,57,64,71,78,85,93,100,101,107,114,121,128,135,143,150,157,164,171,178,185,193,200); //mod7
+  $daily_pattern  = array(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30); //mod1
+
+  #### variables to check value of
+  $varname='recall';
+  #$varname='startrecall';
+  #$varname='startprepare';
+
+
+  $pages = ListPages();
+
+  # 2 loops can be probably optimized since they are ordered by date
+  foreach ($pages as $page) {
+   if ( isset(PageTextVar($page,$varname)) ) {
+    $params = explode(" ",$recall);
+    $patternrecall = $params[1];
+    $daterecall = $params[0];
+    switch($patternrecall){
+	case "daily": $datestorecall = $daily_pattern; break;
+	case "weekly": $datestorecall = $weekly_pattern; break;
+	case "monthly": $datestorecall = $monthly_pattern; break;
+	default: $datestorecall = $exponential_pattern; break;
+    }
+    $current_unix_day = strtotime(date("Y-m-d"));
+    $sign = "+";
+    # else $sign = "-";
+    foreach ($datestorecall as $day) {
+     $checkdate = strtotime((preg_replace("/(\d+)\/(\d+)\/(\d+)/",'$3-$2-$1',$daterecall)." $sign $day days"));
+     # print $daterecall . " + " . $day . " (" . $checkdate . ") == " . date("d/m/Y");
+     if ($checkdate==$current_unix_day)
+     {
+      # generate GUID
+      $item_GUID = $page.'_'.date("Y-m-d");
+      # if not present in file using a regex on the GUID
+      if (preg_match("/$item_GUID/",$feed_oldcontent) == 0)
+      {
+        # generate date
+        $feed_newitemdate = date(DATE_RSS, time());
+        # transform line to XML format
+	$cleaned_page_name = str_replace(".","/",$page);
+	global $FmtV;
+	$pagecontent = FmtPageName($FmtV, $page);
+	# does this actually work?!
+
+	$ItemTitle = "<title>Day $day recall for page $page started at $daterecall</title>";
+	$ItemLink = "<link>$ScriptUrl/$cleaned_page_name#BehaviorRecallDay$day</link>";
+	$ItemDescription = "<description>This is to improve behaviors you decided yourself were valuable. Also don't forget to improve those instructions to be more and more efficient!$pagecontent</description>";
+/*
+		<title>Day $day recall for page $page started at $daterecall</title>
+		<link>$ScriptUrl/$cleaned_page_name#MemorizationDay$day</link>"
+		FeedText($page,$page,"description")
+
+		<title>Day $day of preparation for page $page started at $dateprepare</title>
+		<link>$ScriptUrl/$page</link>
+		<description>This is to improve preparation of things you will have to produce. Also don't forget to improve those instructions to be more and more efficient!</description>
+*/
+
+        $feed_newitem = "<item>\n
+		$ItemTitle
+		$ItemLink
+		$ItemDescription
+		<guid>$item_GUID</guid>
+		<pubDate>$feed_newitemdate</pubDate>\n</item>";
+
+        # appending the item
+        $feed_newcontent .= $feed_newitem;
+      }
+      break; #we can't have 2 days at the same time, move on to the next page
+     }
+     # print "<br/>";
+    } # check if the next recall day is today
+   } # check if the next page is tagged
+  }
+  # feed should be properly updated
+
+  $feed_newdate = date(DATE_RSS, time());
+  $ChannelTitle = "BehaviorRecall";
+  #$ChannelTitle="Memorization";
+  #$ChannelTitle="Preparation";
+  $feed_header = "<?xml version=\"1.0\"?>\n<rss version=\"2.0\">
+	<channel>
+	<title>$ChannelTitle feed for $WikiTitle .</title>
+	<link>$ScriptUrl</link>
+	<description>Receive links as reminded to periodic behaviors you want to transform to habits.</description>
+        <lastBuildDate>$feed_newdate</lastBuildDate>";
+
+  $feed_footer = "\n</channel>\n</rss>";
+
+  print $feed_header; 
+  print $feed_oldcontent; 
+  print $feed_newcontent; 
+
+  print $feed_footer;
+
+  $write_result = file_put_contents($feedfile,$feed_oldcontent.$feed_newcontent);
+  if (!$write_result){
+    if (strlen($feed_oldcontent.$feed_newcontent)>0){
+      print "Creation of the feed file fails, check write permissions for pmWiki and $feedfile.";
+      return;
+    } else {
+      print "No item to generate, did you correctly tag your pages?";
+      return;
+    }
+  }
+}
+