You have a VariablePrefix element specified in the ExtractVariables policy. The value there is myprefix. That means the output variable, if the ExtractVaribles policy succeeds, will be named myprefix.userhref .
You have a VariablePrefix element specified in the ExtractVariables policy. The value there is myprefix. That means the output variable, if the ExtractVaribles policy succeeds, will be named myprefix.userhref .