- From: Jeremy Carroll <jjc@hpl.hp.com>
- Date: Fri, 28 Mar 2008 15:25:03 +0000
- To: Sandro Hawke <sandro@w3.org>
- CC: Phil Archer <parcher@icra.org>, Renato Golin <renato@ebi.ac.uk>, Phillip Rhodes <mindcrime@cpphacker.co.uk>, semantic-web@w3.org, foaf-dev@lists.foaf-project.org
Sandro Hawke wrote: > > In short, triples live forever in the same sense these words I'm writing > (which will be archived in various places) live forever. > I think the validUntil functionality that Phil is describing provides additional functionality over-and-above the usual web expiry mechanisms. If I publish a graph, on the web, making some assertions, then I might reasonably expect that version of the document to be accesible 'for ever' - e.g. in a web archive service. At some point in the future, it becomes unreasonable to hold me to RDF assertions I have made in the past; this will often be later than an HTTP header expiry date. It may also be that the most obvious interpretation of my RDF document will have changed merely by the passage of time. e.g. I may say today that the BBC is a reliable and unbiased news source, and, heaven forbid, politically changes in the future may mean that I no longer hold this opinion. So having the option to state an explicit time out on the semantic content, as opposed to merely the representation, of an RDF document may be useful. i.e. RDF triples are in the present tense - and hence there meaning depends on what we think of as the present. Jeremy
Received on Friday, 28 March 2008 15:27:16 UTC