- From: Raphaël Troncy <Raphael.Troncy@cwi.nl>
- Date: Mon, 08 Dec 2008 23:20:19 +0100
- To: Felix Sasaki <fsasaki@w3.org>
- CC: Silvia Pfeiffer <silviapfeiffer1@gmail.com>, Pierre-Antoine Champin <swlists-040405@champin.net>, public-media-annotation@w3.org
Dear Felix, Sorry, I just bump into this thread (I still need to catch up with many more emails). So for clarifying the issue: http://www.w3.org/Bugs/Public/show_bug.cgi?id=6219 I would also advocate to use URIs as much as we can as values for properties (like PA and Silvia said) and ... > Just a general comment / remark: I know it sounds boring, but ... I > think we should focus on what is current, more or less widely deployed > practice with existing formats. After all we are scheduled to provide > interoperability between properties of these formats and not define new > ones. ... exactly because we would like to be interoperable with existing formats, I will remind that Dublin Core, in its January 2008 recommendation version, add the notion of domain and range for its properties, http://dublincore.org/documents/dc-rdf-notes/. So far, two legacy specifications differ with regard to whether properties such as dc:creator and dc:date have values that are non-literal resources (e.g. a Person or a Date, seen as entities), or literals representing the resources. The new RDF encoding specification supports both of these constructs but bases the choice of one form over the other on the range of a property. A property with a "literal" range will follow the former pattern, while a property with a "non-literal" range will follow the latter. A range of "Agent" has been given to dcterms:creator and dcterms:contributor, where "Agent" is defined as "A resource that acts or has the power to act". >>> So I think both should be possible: string for simplicity, URI for >>> expressivity. May be both could be mixed, e.g. like in mail addresses: >>> >>> dc:creator "P-A. Champin <http://champin.net/foaf.rdf#me>" . Consequently: <http://www.example.com> dc:creator <http://champin.net/foaf.rdf#me> is perfectly valid and I would add should be supported. Best. Raphaël -- Raphaël Troncy CWI (Centre for Mathematics and Computer Science), Kruislaan 413, 1098 SJ Amsterdam, The Netherlands e-mail: raphael.troncy@cwi.nl & raphael.troncy@gmail.com Tel: +31 (0)20 - 592 4093 Fax: +31 (0)20 - 592 4312 Web: http://www.cwi.nl/~troncy/
Received on Monday, 8 December 2008 22:30:42 UTC