W3C home > Mailing lists > Public > www-rdf-logic@w3.org > March 2003

Re: An exciting inference?

From: Dan Brickley <danbri@w3.org>
Date: Sat, 15 Mar 2003 10:06:57 -0500
To: "Roger L. Costello" <costello@mitre.org>
Cc: www-rdf-logic@w3.org
Message-ID: <20030315150657.GA387@tux.w3.org>


In a similar vein (temporal reasoning) you might be interested to check
out this use case I sent to the RDF Calendar mailing list on Wednesday.
Interesting thread followed with ical and rdf markup examples and 

I would like to use RDF calendar 'recurring events' to represent opening 
hours of shops and other services. In particular I'm interested in using the 
Semantic Web to support local small businesses, by mixing descriptions of 
their opening hours with other useful information: homepage of shop, 
opening hours, contact info, photograph of premises, lat/lang/alt location
information, some indication of product lines and individual items for sale.


The bit I'm currently interested in is this:

It says, 'Currently [OPEN]', based on info about opening hours. Their 
summary for the 'Urban Gourmet' place around the corner from here:

	Monday      Closed
	Tuesday      4:00pm - 11:00pm
	Wednesday      11:30am - 11:00pm
	Thursday      11:30am - 11:00pm
	Friday      11:30am - 11:00pm
	Saturday      11:30am - 11:00pm
	Sunday      11:30am - 11:00pm

(ical representation)

(rdf/xml representation, ical-in-rdf)

(running code from DanC, using N3 and Cwm)

	Anyway... this is a long way from rules that specify
	ical exhaustively, but they do cover the "is the
	shop open now?" question pretty well, as long
	as you ask during summer time ;-)

DanC's RDF representation: http://www.w3.org/2002/12/cal/test/bus-hrs.rdf
...and timezone rules in N3: http://www.w3.org/2002/12/cal/tzrules.n3

This isn't quite the same scenario as your's, Roger, but it might well
share some common structure, vocabulary etc...

Also, thanks for prompting more discussion of compelling use cases, scenarios,
inferences... these are very useful both in explaining the semantic web 
initiative and in motiviating and scoping further standards-track work.


Received on Saturday, 15 March 2003 10:06:58 UTC

This archive was generated by hypermail 2.3.1 : Wednesday, 2 March 2016 11:10:39 UTC