- From: Thomas Baker <tom@tombaker.org>
- Date: Tue, 20 Nov 2012 16:24:57 -0500
- To: public-rdfa-wg@w3.org
Dear RDFa WG, Currently, the prefixes "dc:" and "dcterms:" are both mapped in the RDFa Initial Context to the namespace URI http://purl.org/dc/terms/ (here: "/terms/") [1]. It has been pointed out that a considerable amount of data uses, or maps to, DCMI properties with the namespace URI http://purl.org/dc/elements/1.1/ (here: "/1.1/"), which in other contexts has traditionally been mapped to the prefix "dc:". Most of the /terms/ properties have ranges restricted to either literal or non-literal values, while the /1.1/ properties are rangeless (rdfs:Resource by default) -- a characteristic some users see as an advantage (see [2]). DCMI would like to propose to the RDFa Working Group that the prefix "dc11:" be added to the Initial Context for the /1.1/ namespace URI. People who have used "dc:" for /1.1/ properties will need to explicitly declare this as a prefix. However, for those who continue to use /1.1/ properties -- in some cases, precisely because they are rangeless -- inclusion in the Initial Context would emphasize that /1.1/ has not been forgotten or deprecated, reinforce the message that /1.1/ properties should not be "upgraded" to /terms/ properties in a mechanical way, and provide a conventional prefix to use for the properties. Many thanks for your consideration, Tom [1] http://www.w3.org/2011/rdfa-context/rdfa-1.1 [2] http://wiki.dublincore.org/index.php/FAQ/DC_and_DCTERMS_Namespaces -- Tom Baker <tom@tombaker.org> Dublin Core Metadata Initiative Ltd
Received on Tuesday, 20 November 2012 21:25:28 UTC