- From: John Goodwin <John.Goodwin@ordnancesurvey.co.uk>
- Date: Tue, 15 Apr 2008 13:47:58 +0100
- To: "Steve Harris" <swh@ecs.soton.ac.uk>
- Cc: "Michael Smith" <msmith@clarkparsia.com>, <semantic-web@w3.org>
> I don't imagine that you'd want to do something like > > FILTER(withinDistance(?g1, ?g2, 3.2)) > > with triples. You could write it as > > [] a :PairwiseDistance ; > :point ?g1 ; > :point ?g2 ; > :distance ?d ; > FILTER(?d < 3.2) > > but it seems a bit verbose, and if you try to materialise the graph it > will be massive. Agreed - I had imagined that distance calculations/queries would be done using a FILTER rather than as triples. John . This email is only intended for the person to whom it is addressed and may contain confidential information. If you have received this email in error, please notify the sender and delete this email which must not be copied, distributed or disclosed to any other person. Unless stated otherwise, the contents of this email are personal to the writer and do not represent the official view of Ordnance Survey. Nor can any contract be formed on Ordnance Survey's behalf via email. We reserve the right to monitor emails and attachments without prior notice. Thank you for your cooperation. Ordnance Survey Romsey Road Southampton SO16 4GU Tel: 08456 050505 http://www.ordnancesurvey.co.uk
Received on Tuesday, 15 April 2008 12:48:38 UTC