- From: Dan Brickley <danbri@w3.org>
- Date: Tue, 10 Aug 2004 17:04:54 -0400
- To: Simon Price <simon.price@bristol.ac.uk>
- Cc: www-rdf-interest@w3.org
* Simon Price <simon.price@bristol.ac.uk> [2004-08-10 21:58+0100] > > Whoops! I originally only sent this reply to Manuel by mistake so here's > a less concise definition... > > ---- > IFP stands for inverse-functional property. See > http://www.w3.org/TR/owl-ref/ > > It means that a property is "owned" by only one thing. There are more > mathematical ways of saying it too of course. > > Email addresses in FOAF are considered to be IFP: each person can have > multiple email addresses (not functional) but each email address can > have only one owner (functional) - in FOAF it is required that email > addresses are only used by one person which is not always true in > reality of course. Cheers. There's also a longer version of the FOAF-related explanation at http://rdfweb.org/mt/foaflog/archives/2003/07/10/12.05.33/ I should mention that *some* but not *all* mailboxes are "personal mailboxes" in the foaf:mbox sense... Dan
Received on Tuesday, 10 August 2004 21:04:55 UTC