Is <accept> establishing a contract?

[Jan Algermissen <algermissen1971@xxxxxxx>]

Hi,

I have been working on a system that makes use of NewsML (2nd  
generation) and APP. NewsML
to some extend defines a contract between senders and receivers of  
news items, for example that
the receiver of a news item reacts on indications regarding  
limitations of use of the news item
(embargo date, withholding publishing etc.).

I have come to think about whether an APP collection that declares it  
accepts the NewsML G2
media type implicitly declares that it conformes to the NewsML  
processing model or if one would
have to specify this behavior separately (e.g. via a feature element)?

The general question is: Does a collection that declares acceptance of  
a media type implicitly
declare conformance to any processing model/contract the media type  
defines (if so)? Is
<accept> suitable for allowing the client to reasonably expect  
conforming behavior of the
collection?

Jan