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Using MIME types in RDF/DAML and Image Metadata

From: Yarden Katz <katz@underlevel.net>
Date: Sun, 30 Mar 2003 17:34:06 -0500
To: www-rdf-interest@w3.org, www-rdf-logic@w3.org
Message-ID: <86smt4scv5.fsf@underlevel.net>

Hi,

  What are some approaches to assign MIME-types to certain RDF or DAML
  resources?  For example, consider the following:

    <daml:ObjectProperty rdf:ID="Picture">
      <rdfs:label>A Picture</rdfs:label>
      <rdfs:comment>A cute picture class in DAML</rdfs:comment>
      <rdfs:domain rdf:resource="#SomeObject"/>
      <rdfs:range rdf:resource="#????"/>
    </daml:ObjectProperty>

  An agent attempting to render RDF data has no way of knowing that
  resources linked to using the above property are images and are to
  be handled as such.  How can these meaning be conveyed in RDF?  The
  obvious method seems to be to assign a MIME type such as
  "image/jpeg" as the range of this property, but I do not know how
  that can be expressed.  Googling showed up a seemingly relevant link
  "Mapping Between Content-Types (MIME types) and URIs" from
  <http://rdfig.xmlhack.com/2001/05/09/2001-05-09.html> but it is
  broken.  Any ideas you may have on how to attach this elementary
  problem would be great, whether involving usage of MIME or not.

  I have a second question that's related to the above: is there some
  uniform way to note coordinates on an image (similar to an image
  map) in RDF?  For example, expressing something a long the lines of
  "Instances of Object X should be placed in coordinate (X, Y)"  The
  most relevant link I found was:
  <http://www.w3.org/2001/08/rdfweb/foafwho/imagemap/> but it does not
  show an RDF representation of an image map, only the plain HTML one.

Thanks a lot, looking forward to your responses,  
-- 
Yarden Katz <katz@underlevel.net>  |  Mind the gap
Received on Sunday, 30 March 2003 17:03:32 GMT

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