- From: Andrea Perego <andrea.perego@jrc.ec.europa.eu>
- Date: Mon, 20 Feb 2012 01:12:39 +0100
- To: Richard Cyganiak <richard@cyganiak.de>
- Cc: Kjetil Kjernsmo <kjetil@kjernsmo.net>, public-lod@w3.org
On Sat, Feb 18, 2012 at 4:59 PM, Richard Cyganiak <richard@cyganiak.de> wrote: > On 17 Feb 2012, at 23:14, Kjetil Kjernsmo wrote: >>> In general, the RDFa embedded >>> metadata approach can be replaced by using the <link> element href in XHTML >>> to pointing to an external RDF document, where the rel=”meta” attribute can >>> be used to indicate a relationship between resources. >> >> Yes, but rel="meta" is not standardized as far as I know, see >> http://www.w3.org/TR/html4/types.html#type-links > > rel="meta" is standardized: > http://www.w3.org/TR/rdf-syntax-grammar/#section-rdf-in-HTML > http://www.w3.org/TR/cooluris/#linking > > Best, > Richard An alternative would be using wdrs:describedby [1], a property defined in the POWDER-S ontology. The only issue is that the corresponding W3C Recommendation [2] specifies on this property a domain restriction which still needs to be amended, as discussed in [3,4]. Anyway, the corresponding "describedby" relationship type can be safely used in HTML LINK elements, since it is registered by IANA (see the corresponding entry at [5]). Said that, the "meta" relationship type (although, as far as I know, is not registered by IANA) is widely used and it is, currently, the recommended one, as stated in the W3C TRs pointed out by Richard. Andrea ---- [1]http://www.w3.org/2007/05/powder-s#describedby [2]http://www.w3.org/TR/powder-dr/#semlink [3]http://lists.w3.org/Archives/Public/public-powderwg/2010Nov/0005.html [4]http://www.w3.org/2007/powder/powder-errata#describedby [5]http://www.iana.org/assignments/link-relations/link-relations.xml -- Andrea Perego, Ph.D. European Commission DG JRC Institute for Environment & Sustainability Unit H06 - Digital Earth & Reference Data Via E. Fermi, 2749 - TP 262 21027 Ispra VA, Italy DE+RD Unit: http://sdi.jrc.ec.europa.eu ---- The views expressed are purely those of the writer and may not in any circumstances be regarded as stating an official position of the European Commission.
Received on Monday, 20 February 2012 00:13:16 UTC