b75e89ab_contentGoesHere__feature
[JCR / Jackrabbit] Structured node types support inheritence of types, additional cross-cutting aspects can be added with "mixins". Node types can define allowed node types for child nodes in the content hierarchy. [Midgard] MgdSchemas allow inheritance, and an extended type can be instantiated either using the extended type or the base type [CouchDB] Type-free [feature] 
type hierarchy
contentGoesHere
feature