Re: [ontolog-forum] language ambiguity (was: Axiomatic ontology)

[Pat Hayes <phayes@xxxxxxx>]

At 4:24 PM +0000 2/14/08, <matthew.west@xxxxxxxxx> wrote:

> Dear Paola,
>
> > >if you consider this sort of thing to be a tool for
> computer
> > > assisted ontology development, then it can be very
> helpful,
> > particularly
> > > where we are talking about extracting brute facts.
> However,
> > if you are
> > > talking about more general ontology extraction, then of
> > course the ontolgoy
> > > produced is going to be no better than that of the
> document
> > considered, and
> > > there are the usual issues with ambiguity that computers
> > usually struggle
> > > with, especially using words with different senses in
> close
> > proximity.
> > >
> >
> > I  agree, and think that such functionality can be useful to
> aid
> > concept extraction for further refinement. How does the
> system
> > identify the classes, objects and relations I dont understand, do
> they
> > have to be in RDF? Or how does it do it? (haven't read the
> > documentation)
>
> MW: What I have seen is a kind of NLP parsing, so nouns are
> classes,
> proper names are individuals, spotting patterns for names of
> people,
> addresses, and company names, dates, and then understanding the
> patterns
> around certain key words, so when you see something like:
> "Shell bought XYZ co from ABC Corp on July 17th 2006"
> it can create the appropriate records of the activity, when it
> happened
> and who the parties were
> involved.

And that 'ABC Corp' is a legal agent but not a human person, and so (probably) is 'Shell'; and from something like

"Captain J. Shoemaker, commander of the 37th calvary, ..."

that the commander of a calvary (a military group entity) called the '37th calvary' is a human being holding the rank of Captain with the name "J. Shoemaker" (al italics indicating ontology relationships). Things like that. They do what one might call phraseal micro-parsing (not a technical term) based on language statistics and some shallow but useful semantic knowledge of word usage. The general technique is often called text-scraping.

Pat

> Regards
>
> Matthew West
> Reference Data Architecture and Standards Manager
> Shell International Petroleum Company Limited
> Registered in England and Wales
> Registered number: 621148
> Registered office: Shell Centre, London SE1 7NA, United Kingdom
>
> Tel: +44 20 7934 4490 Mobile: +44 7796 336538
> Email: matthew.west@xxxxxxxxx
> http://www.shell.com
> http://www.matthew-west.org.uk/
>
> >
> >
> > Paola Di Maio
> > 
> >
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