[Semantics] Policy expressions that propose terms of usage from an Asset owner [Comment] Must contain a Party entity with Assigner role. The Offer may contain a Party entity with Assignee role, but does not grant any privileges to that Party. [Identifier] 
Offer
A g r e e m e n t
O f f e r
P r i v a c y
R e q u e s t
S e t
T i c k e t