a0d929ca_WSRP_v2_0_Specification__Statement_text
[#] CS160 [Section] 9.3 [Statement text] 
Portlets choosing to apply namespace encoding to items that become part of a user interaction MUST process these items with their namespace prefix attached as Consumers MUST NOT remove such prefixes, regardless of whether Consumer rewriting or Producer writing was used to attach the prefix.
WSRP v2.0 Specification
Statement text