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

Re: Is google a conceptual graph engine?

• To: xml-dev@l...
• Subject: Re: Is google a conceptual graph engine?
• From: "Thomas B. Passin" <tpassin@c...>
• Date: Tue, 07 Oct 2003 00:03:33 -0400
• In-reply-to: <000001c38c77$76344600$c801a8c0@DIDIERHOME>
• References: <000001c38c77$76344600$c801a8c0@DIDIERHOME>
• User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.5b) Gecko/20030901 Thunderbird/0.2

Didier PH Martin wrote:

> Question: is the web agile or static? Is it possible to create a perfect
> model? If not, how can it be changed? This leads to the problem of version.
> I tried to see if an OWL model includes a versioning mechanism but wasn't
> able to find it. Maybe I have not looked at the right place. Where is it
> specified?

OWL was designed with versioning in mind.  For example, look in the "OWL 
Web Ontology Language Overview"

http://www.w3.org/TR/owl-features


"Versioning:

     * versionInfo
     * priorVersion
     * backwardCompatibleWith
     * inCompatibleWith
     * DeprecatedClass
     * DeprecatedProperty"


> 
> Note: John Sowa proposed the following definition for a prototype based
> ontology
> 
> prototype-based ontology. 
> A terminological ontology whose categories are distinguished by typical
> instances or prototypes rather than by axioms and definitions in logic. For
> every category c in a prototype-based ontology, there must be a prototype p
> and a measure of semantic distance d(x,y,c), 

That's the problem for common usage - how to define the distance.


> ... As an example, a black cat and an orange cat would be considered very
> similar as instances of the category Animal, since their common catlike
> properties would be the most significant for distinguishing them from other
> kinds of animals. But in the category Cat, they would share their catlike
> properties with all the other kinds of cats, and the difference in color
> would be more significant. In the category BlackEntity, color would be the
> most relevant property, and the black cat would be closer to a crow or a
> lump of coal than to the orange cat. 

Notice how similar this is to fuzzy classification.  You have described 
a notion of "how well" a black cat fits the category BlackEntity - that 
is a fuzzy classification notion.  One should be able to apply fuzzy 
classification methods to compute such "distances", I would think.

Cheers,

Tom P

• Follow-Ups:
  • RE: Is google a conceptual graph engine?
    • From: "Didier PH Martin" <martind@n...>

• References:
  • RE: Is google a conceptual graph engine?
    • From: "Didier PH Martin" <martind@n...>

• Prev by Date: Re: Ontologies and fuzzy set
• Next by Date: [off-topic] Re: Managing Innovation
• Previous by thread: RE: Is google a conceptual graph engine?
• Next by thread: RE: Is google a conceptual graph engine?
• Index(es):
  • Date
  • Thread