>Why would the request fail?
If the server has no intent to support non-cmis documents, then it would
not advertise it supports those media types. Adding profile=cmis or
cmisprofile=1.0 to the atom media type solves the signaling issue. If
the repository does advertise it supports those media types, then it is
a configuration issue of the underlying repository due to a) no default
type available b) default type requires information not specified or c)
some other resource not available (network between tiers, database,
storage, etc)
>AFAICT, there is
>no need to do so. Just send the AtomPub/HTTP message to the server.
The server could return the following to handle the scenarios:
412 Precondition failed (httpbis[1]) (a or b)