<?xml version="1.0" encoding="UTF-8"?>
<merges xmlns:ns2="http://wadl.dev.java.net/2009/02">
  <!-- add media types to POST/PUT -->
  <merge type="node" action="add" xpath="//ns2:method[@name='POST' or @name='PUT']">
    <ns2:request>
      <ns2:representation mediaType="application/json; charset=utf-8"/>
      <ns2:representation mediaType="application/vnd.slc+json; charset=utf-8"/>
      <ns2:representation mediaType="application/xml; charset=utf-8"/>
      <ns2:representation mediaType="application/vnd.slc+xml; charset=utf-8"/>
    </ns2:request>
    <ns2:response>
      <ns2:representation mediaType="*/*"/>
    </ns2:response>
  </merge>

  <!-- add media types to DELETE -->
  <merge type="node" action="add" xpath="//ns2:method[@name='DELETE']">
    <ns2:response>
      <ns2:representation mediaType="*/*"/>
    </ns2:response>
  </merge>

  <!-- add media types to GET -->
  <merge type="node" action="add" xpath="//ns2:method[@name='GET']">
    <ns2:request />
    <ns2:response>
      <ns2:representation mediaType="application/json; charset=utf-8"/>
      <ns2:representation mediaType="application/vnd.slc+json; charset=utf-8"/>
      <ns2:representation mediaType="application/xml; charset=utf-8"/>
      <ns2:representation mediaType="application/vnd.slc+xml; charset=utf-8"/>
    </ns2:response>
  </merge>
</merges>

Add merge for MediaTypes for GET, POST, PUT and DELETE
Add merge for MediaTypes for GET, POST, PUT and DELETE
