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RE: mime types and xml dialects

• To: Chris Wilper <cwilper@c...>
• Subject: RE: mime types and xml dialects
• From: bry@i...
• Date: Sat, 20 Sep 2003 00:41:32 CET
• Cc: xml-dev@l...

it could be extended, but I bet a lot of 
people's code would prove to be affected by 
such an extension. 

the main question is how to decide what to 
serve a resource as, as opposed to the 
presentation side of my application, where 
users move from the general presentation 
possibilities to the specific it seems to me 
that it's most logical to serve the most 
specific mime type applicable to the 
resource first, or one could be pragmatic 
and serve the most common version of a 
format; i.e. in the case of vcard that is 
rdf+xml process the resource to an x-vcard,  
set the mime type, and add application 
specific response headers whereby a client 
can find out that the resource their 
response was derived from is also available 
as rd+xml and so forth. 
> 
> I meant to add to that: the trick that's 
used with
> xml formats might be extended to rdf+xml-
based formats.
> 
> Assuming someone created a media type that 
was based
> on rdf+xml, it seems that the trick of 
parsing the
> mime type would be handy if it was 
something like
> blah/vcard+rdf+xml
> 
> But then, I have a love-hate relationship 
with
> media types as currently concieved, so I 
could change
> my opinion on that.
> 
> - Chris 
> 
> -----Original Message-----
> From: Chris Wilper 
> Sent: Friday, September 19, 2003 10:36 AM
> To: bryan; xml-dev@l...
> Subject: RE:  mime types and xml 
dialects
> 
> 
> 
> HTTP 1.1 has content negotation:
> 
http://www.w3.org/Protocols/rfc2616/rfc2616-
sec12.html#sec12
> 
> But you might be after something simpler.
> Ideally your xml-based formats would have 
their own media types,
> and the fact that they end in "+xml" (as 
they should) would
> signal to a client that they can be 
processed in either a
> specialized or generic way.
> 
> - Chris
> 
> -----Original Message-----
> From: bryan [mailto:bry@i...]
> Sent: Friday, September 19, 2003 6:32 AM
> To: xml-dev@l...
> Subject:  mime types and xml 
dialects
> 
> 
> 
> 
> 
> Hi,
> 
> When returning a mime type of a resource, 
if that resource is a dialect
> of xml then the more general type is 
text/xml but the more specific type
> can be application/rdf+xml which in turn 
can be even more closely
> specified as a subset of RDF.
> 
> Currently what I'm doing is returning 
text/xml for generic xml
> documents, and application/rdf+xml for all 
dialects of rdf; what I'm
> considering is the possibility of adding 
http headers that specify that
> there is a range of mime types possible 
for a resource, and their
> likelihood of being the best type for a 
resource. 
> 
> Anyone done anything with that, pointers 
to discussions, projects and
> similar stuff in the past would be helpful.
> 
> 
> 
> 
> 
> 
> 
> 
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