a0d929ca_WSRP_v2_0_Specification__Statement_text
[#] CS122 [Section] 7.12 [Statement text] 
The supplied set of property changes MUST be processed together. In particular, validation SHOULD only be done considering the entire set as partial updates could easily create an internally inconsistent set of properties. The storage of the update caused by applying the set of property updates SHOULD only occur after the Producer/Portlet executes this validation.
WSRP v2.0 Specification
Statement text