Section 3.2 of WS-Fragment contains the following sentence in the description of /wst:Put/wsf:Fragment/wsf:Expression:

"This element identifies which fragment in the resource this operation applies to. If the value of this element does not conform to the syntax of the language specified in the Language attribute, or is semantically invalid, a wsf:InvalidExpression fault MUST be generated. 

This element identifies the fragment in the resource as it appears after successfully processing the Put request."

The statements "this element identifies which fragment in the resource this operation applies to" and "this element identifies the fragment in the resource as it appears after successfully processing the Put request" are contradictory.