913aca9a_ent_repository___Henri_Bergius__CouchDB
[feature] References [JCR / Jackrabbit] Nodes can reference each other with hard link (special property type) or soft link (by referring to the node path) [Midgard] MgdSchema types can have properties linking to other objects of same or different type. A link of "parentfield" type places an MgdSchema type in a tree. [CouchDB] 
No reference support built-in
What is a content repository - Henri Bergius
CouchDB