When you add verification points, the results from a service message return are compared with the expected data that is specified in the verification point test element. With query verification points, you can check that the number of nodes returned by an XML Path language query matches the expected number of nodes specified in the verification point.
Refer to the XPath specification for details on expressing an XPath query: http://www.w3.org/TR/xpath.
You can use the test editor to create or edit verification points.