From the JAX-WS 2.0 specification

Implementing Enterprise Web Services (JSR 109) The JSR 109[14] defined jaxrpc-mapping-info
deployment descriptor provides deployment time Java , WSDL mapping functionality. In conjunction
with JSR 181[13], JAX-WS 2.0 will complement this mapping functionality with development
time Java annotations that control Java , WSDL mapping.