Chapter 4.1.1. JAX-RPC Support Changes of the Migration Guide says that "Use of JAX-RPC web services can be identified by the presence of a webservices.xml XML descriptor file. This file contains a <webservice-description> element that includes a <jaxrpc-mapping-file> child element ."

That's true (by the way, there's an extra space before the final period), but it's not the only way JAX-RPC services manifest. Other places where JAX-RPC manifests (that I'm aware of):

• ejb-jar.xml XML file can have a service-ref referencing a JAX-RPC mapping file (/ejb-jar/enterprise-beans/session/service-ref/jaxrpc-mapping-file)
• JAX-RPC mapping files themselves (any XML file whose root element is java-wsdl-mapping)

This should probably be documented.