Relax NG Schemas - change content model of Reify to Nodes only
Should Reify have its own edge element (e.g. content)? This would allow Reify to have the same content as any other Node (oid, degree, meta, ...).
Unit Tests - make some fail tests that have a RuleML edge element inside Reify
From http://wiki.ruleml.org/index.php/Reification_Content_Model_Restricted_to_Nodes_Only