Add the ability for posts to have metadata. The option is turned off by default,

but can be enabled in the CS.  If the option is turned on, and metadata is
enabled on the site, then sets of template variables will be made available
to the Post Form template, the Thread view template, and the CS view template.

docs/changelog/7.x.x.txt

@@ -9,6 +9,7 @@
     http://www.plainblack.com/rfe/request-for-enhancement/-1493348--js-confirmation-operation/databaselink/re--1493348--js-confirmation-operation/databaselink.pm#OUb5zN8bltGdPG_2LJZMGQ
  - add: User profile data table is now a flat table, one column for each
     field.
+ - add: Posts can now have Metadata (United Knowledge)
  - add: Calendar events now allow attachments
  - add: Calendar events now allow setting view permissions
  - add: WebGUI::Paginator now capable of more efficient SQL paginations using

docs/upgrades/upgrade_7.3.19-7.4.0.pl

@@ -25,6 +25,7 @@ addGroupingsIndexOnUserId($session);
 fixProfileDataWithoutFields($session);
 buildNewUserProfileTable($session);
 addAttachmentsToEvents($session);
+addMetaDataPostsToCS($session);
 
 finish($session); # this line required
 
@@ -105,6 +106,18 @@ sub fixProfileDataWithoutFields {
 }
 
 
+#----------------------------------------------------------------------------
+
+sub addMetaDataPostsToCS {
+    my $session     = shift;
+    my $db          = $session->db;
+    
+    print "\tAdding feature to CS to enable meta data in posts... " unless $quiet;
+    $db->write("alter table Collaboration add column enablePostMetaData int(11) not null default 0");
+    print "OK!\n" unless $quiet;
+}
+
+
 #----------------------------------------------------------------------------
 
 sub buildNewUserProfileTable {