Web service with criteria: Extending WSDL

WSDL is used to describe the interface of a service, in XML format. The interface describes the functional properties as well as non functional properties. We are concerned with specifying `criteria´ as a non functional property of a web service. For this we have extend WSDL to X-WSDL. In order to add criteria information we extend the WSDL (Web Service Definition Language) schema by adding a new element `criteriaservice´ this is available in the new namespace. Using this `criteriaservcie´ element it is possible to specify the criteria along with a service in an X-WSDL document. The WSDL document is also extended by adding new attributes `criteria name´ and `description´ to service element. Using this extension it is possible to specify the criteria along with the service in X-WSDL document. The criteria are specified by the user when invoking a service. As a result, we are providing support to discover a more appropriate service according to his/her requirement.