a0d929ca_WSRP_v2_0_Specification__Statement_text
[#] CS152 [Section] 9.2.2.5 [Statement text] 
The Consumer MUST integrate placeholders for at least the portlet URL parameters wsrp-url, wsrp-resourceID, wsrp-preferOperation, wsrp-requiresRewrite and wsrp-resourceState to allow the Portlet to place all the pieces of information it could use for accessing a resource.
WSRP v2.0 Specification
Statement text