This link relation is defined in IETF RFC-5829.

Some content items returned by the web service may have an unpublished staged copy. A working-copy link points from a content item to such a working copy.

The following example shows a content item entry resource containing a link of this type:

<entry xmlns="" xmlns:app="" xmlns:metadata="" xmlns:dcterms="">
        href="http://href="host-ip-address/webservice/escenic/content/6" rel="working-copy"/>