RDF PNG Icon

by Dave Beckett

I have created a PNG[PNG] icon RDF for pointing at RDF content inspired by the XML icon made by Dave Winer. The image contains its own embedded description including the terms of use as both PNG metadata:

Title	Resource Description Framework (RDF) Icon
Author	Dave Beckett - http://purl.org/net/dajobe/
Description	An icon for linking to Resource Description Framework
 (RDF) content.
Copyright Copyright 2001 Dave Beckett.  Freely usable for pointing at
 RDF content as long as this embedded metadata is preserved.  This
 image must not be converted to a GIF.
"Creation Time"	2001-04-16
Software	GIMP

and embedded RDF/XML metadata:

<?xml version="1.0" encoding="iso-8859-1"?>
<rdf:RDF xmlns:rdf='http://www.w3.org/1999/02/22-rdf-syntax-ns#'
         xmlns:dc='http://purl.org/dc/elements/1.1/'>
  <rdf:Description rdf:about="">
    <dc:creator>Dave Beckett</dc:creator>
    <dc:creator rdf:resource="http://purl.org/net/dajobe/"/>
    <dc:source rdf:resource="http://purl.org/net/dajobe/2001/04/rdf-icon/"/>
    <dc:title>Resource Description Framework (RDF) Icon</dc:title>
    <dc:description>An icon for linking to Resource Description Framework (RDF) content.</dc:description>
    <dc:rights>Copyright © 2001 Dave Beckett.  Freely usable for pointing at
 RDF content as long as this embedded metadata is preserved.  This
 image must not be converted to a GIF.</dc:rights>
    <dc:date>2001-04-16</dc:date>
  </rdf:Description>
</rdf:RDF>

I suggest you use it something like this:

<a href="rdf-content" title="RDF version of the content" type="application/rdf+xml"><img src="rdf.png" alt="RDF" width="36" height="14" border="0"/></a>

Note that RDF's XML syntax has no registered Internet Media Type (MIME type) at present however it probably will be application/rdf+xml based on the hints in [RDFMT1], [RDFMT2] and [XMLMT].

References

[RDFMT2] Media Type for Resource Description Framework (RDF) by Aaron Swartz and Dan Connolly, April 2001.

[RDFMT1] A media type for Resource Description Framework (RDF) - Internet-draft-to-be, Dan Connolly, March 2001.

[XMLMT] RFC 3023 - XML Media Types by M. Murata, S. St. Laurent and D. Kohn - IETF Proposed Standard, Jan 2001 which includes content type application/rdf+xml as an example.

[PNG] PNG (Portable Network Graphics) Specification, Version 1.2, July 1999.

$Id: index.html,v 1.2 2001/04/19 14:12:07 cmdjb Exp $