One of the cert objectives in Mikalai Zaikin cert guide is
1.1.6. Configure deployment descriptors (web.xml, webservices.xml) for URL patterns, HTTP security, container authorization, caller authentication, and message protection. JAX-WS runtime may also be configured to perform message layer authentication and protection.
I want to know what is webservices.xml, where is it stored, what is its contents, what purpose does it solve in Web Service ?