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Re: Silly question on IFPs.

From: Simon Price <simon.price@bristol.ac.uk>
Date: Tue, 10 Aug 2004 21:58:20 +0100
Message-ID: <411936EC.50506@bristol.ac.uk>
To: www-rdf-interest@w3.org

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

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.


Manuel Vzquez Acosta wrote:
> Hi all:
> Ive been reading some posts on the list and continually finding the 
> term IFP. What are those?
> Sorry for being so nave.
> Regards,
> Manuel.


Simon Price, Technical Consultant, Internet Development Group
Institute for Learning and Research Technology
Received on Tuesday, 10 August 2004 20:58:23 UTC

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