•JSR168 allows
portlets to set properties that do not currently exist
•WSRP requires
Consumers to only set properties that are described.
•v0.8 added “While it is
possible this set of properties change with time (entity
dynamically creates new properties), Producers/entities SHOULD make the returned modelDescription as complete [static] as possible.” in section 7.7.
–Equivalent
language at EntityDescription level