> I would suggest taking a look at the Unified Digital Format Registry
> (UDFR).   It's the result of the merger of of two existing registries,
> designed to carry a more information than just mime types.

> The UDFR is a reliable, publicly accessible, and sustainable knowledge base

> > of file format representation information for use by the digital
> > preservation community.
> > A format is a set of semantic and syntactic rules governing the mapping
> > between abstract information and its representation in digital form. While
> > many worthwhile and necessary preservation activities can be performed on a
> > digital asset without knowledge of its format, that is, merely as a
> > sequence of bits, any higher-level preservation of the underlying
> > information content must be performed in the context of the asset's format.
> > The UDFR seeks to "unify" the function and holdings of two existing
> > registries, PRONOM <http://www.nationalarchives.gov.uk/PRONOM> and GDFR<http://gdfr.info/> (the
> > Global Digital Format Registry), in an open source, semantically enabled,
> > and community supported platform.
> > The UDFR was developed by the University of California Curation Center (
> > UC3 <http://www.cdlib.org/uc3>) at the California Digital Library (CDL<http://www.cdlib.org/>),
> > funded by the Library of Congress <http://www.loc.gov/> as part of its
> > National Digital Information Infrastructure Preservation Program (NDIIPP<http://www.digitalpreservation.gov/>).
> > The service is implemented on top of the OntoWiki<http://ontowiki.net/Projects/OntoWiki> semantic
> > wiki and Virtuoso<http://www.openlinksw.com/dataspace/dav/wiki/Main/VOSRDFWP> triple
> > store.

> ------------------------------

> application/rdf+xml is  http://udfr.org/udfr/u1r130

> Simon

> On Wed, Apr 25, 2012 at 9:29 AM, Richard Cyganiak <rich...@cyganiak.de>wrote:> On 25 Apr 2012, at 14:01, Dan Brickley wrote:
> > > There's also an old W3C TAG note on this,
> > >http://www.w3.org/2001/tag/2002/01-uriMediaType-9 ... perhaps worth
> > > checking in there for progress?

> > The question of URIs for media types is one that comes up *all the time*.

> > This TAG Finding from 2002 recommends that IANA mint URIs for media types.

> > As far as I know, no progress has been made.

> > Does anyone have a contact in IANA who might give some insights into the
> > obstacles or suggest how progress could be made?

> > Should we approach the TAG and ask them again to lobby IANA?

> > Best,
> > Richard