--- a/db/pubsub.sql	Mon May 06 00:11:44 2013 +0200
+++ b/db/pubsub.sql	Mon May 06 00:26:37 2013 +0200
@@ -13,7 +13,9 @@
     persist_items boolean,
     deliver_payloads boolean NOT NULL DEFAULT TRUE,
     send_last_published_item text NOT NULL DEFAULT 'on_sub'
-        CHECK (send_last_published_item IN ('never', 'on_sub'))
+        CHECK (send_last_published_item IN ('never', 'on_sub')),
+    publish_model text NOT NULL DEFAULT 'publishers'
+        CHECK (publish_model IN ('publishers', 'subscribers', 'open'))
 );
 
 INSERT INTO nodes (node, node_type) values ('', 'collection');