[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message]

Re: Semantic Web and First Order Logic

rdf first order logic
Bullard, Claude L (Len) wrote:

> Is it true or false that the semantic web
> limits the use of First Order Logic?

There is no single answer to that question.

As has been noted there are good reasons to restrict the formalism used to
model a problem, particularly that such restrictions, when properly made,
can greatly increase the speed of computations. The Web Ontology WG has
spent a great deal of time discussing such issues.

We've come up with 3 sublanguages of OWL, OWL Lite, OWL DL and OWL Full.


OWL Lite is the easiest to implement and guarantees the best worst case
reasoning performance.
OWL DL is a bit more complex to implement but guarentees that reasoning,
basically, can be performed in finite time.
OWL Full (which allows classes to be treated as individuals and hence is
'second orderish') makes no such guarentees on decidability nor
completeness -- though future work may allow this).

To be clear, RDF and RDF Schema are fairly unconstrained in what one can say
about what, and semantic extensions, such as N3/CWM are not necessarily
'first order'. For this reason, I wouldn't say that it has been decided in
any way shape or form that the Semantic Web need correspond directly to
First Order Logic (whatever the correspondance between a concept such as the
SW and a formalism such as FOL is intended to mean).




Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced!

Buy Stylus Studio Now

Download The World's Best XML IDE!

Accelerate XML development with our award-winning XML IDE - Download a free trial today!

Don't miss another message! Subscribe to this list today.
First Name
Last Name
Subscribe in XML format
RSS 2.0
Atom 0.3

Stylus Studio has published XML-DEV in RSS and ATOM formats, enabling users to easily subcribe to the list from their preferred news reader application.

Stylus Studio Sponsored Links are added links designed to provide related and additional information to the visitors of this website. they were not included by the author in the initial post. To view the content without the Sponsor Links please click here.

Site Map | Privacy Policy | Terms of Use | Trademarks
Free Stylus Studio XML Training:
W3C Member
Stylus Studio® and DataDirect XQuery ™are products from DataDirect Technologies, is a registered trademark of Progress Software Corporation, in the U.S. and other countries. © 2004-2013 All Rights Reserved.