What are the must know things about CA Devtest from webservice automation perspective?
Please see documentations on Webservices testing.
Web Service Execution (XML) Step - DevTest Solutions - 10.3 - CA Technologies Documentation
Tutorial 8 - Test a Web Service - DevTest Solutions - 10.3 - CA Technologies Documentation
DevTest Portal lets you create a virtual service from one or more WSDL documents.
Using DevTest Portal with CA Service Virtualization - DevTest Solutions - 10.3 - CA Technologies Documentation