a0d929ca_WSRP_v2_0_Specification__Statement_text
[#] CS216 [Section] 9.2.2 [Statement text] 
These tokens are enclosed in curly braces (i.e. "{" and "}") and contain the name of the portlet URL parameter which the Producer MUST replace (using "" for those parameters where the Producer has no value).
WSRP v2.0 Specification
Statement text