Verification of Time Constraints Consistency on Web Service Composition Based on ETPN

The work of Web Service verification mainly concentrated in testing service functional correctness, the non-functioning attribute description and verification is relatively rare. For the lack of non-functioning attribute service verification, the available time phrase of Web Service is added into the OWL-S model to describe time-attribute, establish the mapping rules and transformation method from OWL-S process model to ETPN, and the available time relation matrix is proposed to verify time constraints consistency based on the ETPN theory, it can help to remove the plan of service composition has time conflict and avoid the waste of Web Service resource.