a0d929ca_WSRP_v2_0_Specification__Statement_text
[#] CS227 [Section] 5.1.3 [Statement text] 
In order to support items that could become part of a URL activation, this token MUST remain constant for the lifetime of the portletInstanceKey and be the value used for both Consumer and Producer namespacing (see [Section 9.3]).
WSRP v2.0 Specification
Statement text