Hi Pat, On Sun, Sep 5, 2010 at 6:31 PM, Pat Hayes <[email protected]> wrote:
On Sep 5, 2010, at 4:48 PM, Bob MacGregor wrote: > My personal interest is in a query language for RDF that's easy to use, and, among other things, > has a negation operator that is intuitive. Id be interested to know what you consider to be intuitive here. Is negation by failure intuitive for most Web sources? Do you routinely conclude, from a failure to find a sentence asserted on a website, that it is false? Fundamental to your argument seems to be "sentence asserted on a website". If I grabbed triples from some random Website, I might not be confident in using NAF. But I don't do that. I work with graphs that I've built from sources I trust, and I know which parts of the graph are expected to be complete, and NAF is perfect for those parts. - Bob
