b75e89ab_contentGoesHere__feature
[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 [feature] 
References
contentGoesHere
feature