- From: Phil Archer <phil.archer@icra.org>
- Date: Wed, 23 Mar 2005 16:35:39 -0000
- To: <semantic-web@w3.org>
Dear all, Those at the second day of the SWIG meeting in Boston recently have had a preview of this. Various people and organisations have been working on a method of grouping URIs together and linking them to a common description, what we call a content label. This is, I know, potentially confusing since we're not talking about rdfs:label. ICRA's use case is that this can supersede PICS in offering a way for content providers to label their content in terms of the various things parents in different parts of the world don't want their children to see (types of nudity, sexual material, violence, language, racism etc.). There are others however - DC and Creative Commons information, for instance, will generally apply to more than one of your resources. The mobile industry is looking at a "Mobile OK" label for resources that work well on mobile devices. The recent thread on this interest group between Benjamin Nowak and Stephen Rhoads (SemWeb Non-Starter -- Distributed URI Discovery) might perhaps be relevant here too since our aim is to make it possible to parse an RDF instance that contains descriptions for a whole bunch of URIs. Our solution is to create a simple ruleset that takes a URI as an input and gives a description as output. In essence, the system amounts to: 1. If you're on any of the following hosts, the default content label is #here. 2. There now follows an ordered sequence of regular expressions for you to match against your target URI. As soon as you get a match, take the associated label. 3. If no match, thre default description applies. We offer machanisms that distinguish between a content label as a class that has descriptive properties, a content label that delivers management information (like DC and CC stuff), and a class that serves a description in itself, such as "PG-13". Use cases and general information is at [1] with a description of the schema itself at [2]. I have applied the system to ICRA's use case and created what this group might call an RDF generator at [3] that allows you to "label your website" and a basic tool to test those labels at [4]. The latter is very much under development and will make full use of SPARQL in due course and may do other fancy things - as ever, it's all about time and priorities! Incidentally, Piggy Bank [5] shows up the content labels nicely, but, being unaware of the rule methods we've proposed, shows all available labels without knowing which label applies to the particular page you're on. Comments more than welcome. Thank you Phil Archer www.icra.org [1} http://www.w3.org/2004/12/q/doc/rdf-contentlabels.html [2] http://www.w3.org/2004/12/q/doc/content-labels-schema.htm [3] http://www.icra.org/RDF/label/ [4] http://www.icra.org/RDF/label/tester/ [5] http://simile.mit.edu/piggy-bank/
Received on Wednesday, 23 March 2005 16:39:37 UTC