- From: Danny Ayers <Danny.Ayers@highpeak.ac.uk>
- Date: Fri, 10 Dec 1999 10:06:32 +0000
- To: "www-rdf-interest@w3.org" <www-rdf-interest@w3.org>
Hi, I'm just wondering what angle the proposed RDF spec takes for dealing with uncertainty, and the 'truth' of a statement. As an extreme case let's have the assertion in one place (abstracting it a bit) Object : Freddy's cat Attribute : Colour Value : Red and elsewhere we have the assertion Object : Freddy's cat Attribute : Colour Value : Green As I see it, there are essentially two approaches available - 1. there is no need for implicit definition of certainty within RDF; 2. certainty can be expressed in a RDF triple. With 1, it could be left to a reasoning engine to determine which of these statements is more likely to be true - following a chain of authority perhaps, if the chain leads back to a document with Freddy as the author, then we take his word on it. With 2, we could have additional assertions along the lines of : Object : The first statement about the colour of Freddy's cat Attribute : Certainty Value : 0.9 or even Object : This document Attribute : Certainty Value : 0.01 Any thoughts on this? I must confess that my knowledge of RDF is pre-pubescent, and apologies if I've missed a relevant thread or document. Cheers, Danny. Having looked at other knowledge representation methods in the past ------------- Click on a button on this site to make a *free* food donation to hungry people (paid for by sponsors) : http://www.thehungersite.com/index.html
Received on Friday, 10 December 1999 05:07:43 UTC