OWL

http://www.w3.org/2004/OWL/

OWL, the "Web Ontology Language", is a language for describing ontologies. "OWL builds on RDF and RDF Schema and adds more vocabulary for describing properties and classes".

Let's say you have a concept of location. You could say in your language: "Santa-Cruz is-a City. Santa-Cruz is-located-in California. California is-located-in United-States-of-America. United-States-of-America is-located-in Earth."

Now, can a computer know that "Santa-Cruz is-located-in Earth?" Theoretically, yes, but you have to give it a piece of information: "if A is-located-in B, and if B is-located-in C, then A is-located-in C." (Math people call this the "transitive property.")

Once you've told a computer that A-in-B & B-in-C means A-in-C, then it can figure out that Santa-Cruz is-located-in the-World.

OWL is the language in the W3C's Semantic Web suite that takes care of saying things like "A-in-B & B-in-C means A-in-C."

See also: ESW:FormalSystemsLanguage


CategoryAboutOntologies?

CategorySemanticWeb

Discussion

I've fixed a lot of TaoRiver image links; ESW is in general more colorful now, and the ESW:FormalSystemsLanguage page has the cool graphic I made, explaining all this stuff.

Ah, what the hell- I'll just link it right here:

http://taoriver.net/img/for_esw/formal_systems.png

Makes more sense when you have the accompanying text though- read it at ESW:FormalSystemsLanguage

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