[Accessforall] Fwd: DCMI Metadata Terms available in multiple formats via content negotiation

Liddy Nevile liddy at sunriseresearch.org
Thu Jun 14 03:29:56 UTC 2012

Folks, I think these announcements offer some important information  
and ideas that we should consider:


Following the W3C guidelines "Best Practice Recipes for Publishing RDF  
Vocabularies" [1], documentation of DCMI's metadata terms may now be  
requested by Web browsers and software applications in several  
formats.  For example, an RDF description of the DCMI property "Title"  
may be requested as a file in RDF/XML [2] or Turtle [3] syntax, via  
HTTP content negotiation, or as an HTML page with an RDF  
representation embedded in its markup using RDFa [4]. Since March  
2000, users navigating to the URI http://purl.org/dc/elements/1.1/ 
title [5] in a Web browser have been shown a difficult-to-read RDF/XML  
schema.  Browsers will now display a human-readable HTML document, and  
most browsers will take users to the spot in the page where the  
property "Title" is defined [6].  DCMI's implementation of content  
negotiation was undertaken by Jon Phipps with assistance from Tom  
Baker and Jinho Park.  Interested software implementers are invited to  
inspect, comment on, contribute to, or raise issues about [7] the  
approach taken, which is fully documented in an open-source repository  
on GitHub [8].

[1] http://www.w3.org/TR/swbp-vocab-pub
[2] http://dublincore.org/2012/06/14/dcterms.rdf
[3] http://dublincore.org/2012/06/14/dcterms.ttl
[4] http://dublincore.org/documents/2012/06/14/dcmi-terms/
[5] http://purl.org/dc/terms/title
[6] http://dublincore.org/documents/2012/06/14/dcmi-terms/#terms-title
[7] https://github.com/dublincore/website/issues
[8] https://github.com/dublincore/website
A maintenance release of DCMI Metadata Terms [1], published today, now  
includes HTML markup describing all of its properties, classes,  
datatypes, and vocabulary encoding schemes in machine-readable RDF [2]  
in accordance with the new W3C RDFa Lite 1.1 specification [3].  RDFa  
Lite 1.1, published as a W3C Recommendation on 7 June 2012, is the  
simplest variant of RDFa, a syntax for embedding structured data in  
Web pages.  A Web page with RDFa provides -- in the same source  
document -- both the human-readable text rendered on-screen by  
browsers and the detailed machine-readable representation needed by  
Semantic Web applications.   The publication software used by DCMI for  
the past decade was modified and extended to support RDFa by Hugh  
Barnes, Gregg Kellogg, and Mitsuharu Nagamori with help from Manu  
Sporny, Tom Baker, Dan Brickley, and Jon Phipps.  All of the software  
and data used to generate this documentation is available from an open- 
source repository on GitHub [4].

[1] http://dublincore.org/documents/2012/06/14/dcmi-terms/
[2] http://goo.gl/9eA0t
[3] http://www.w3.org/TR/rdfa-lite/
[4] https://github.com/dublincore/website

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