Re: BNodes in OWL

Peter F. Patel-Schneider wrote:

>From: Chuming Chen <chen@musc.edu>
>Subject: BNodes in OWL
>Date: Wed, 01 Mar 2006 23:13:52 -0500
>
>  
>
>>Dear All,
>>
>>Is it possible to have BNodes in OWL?
>>
>>Can anybody give an example or point some references?
>>
>>Thanks,
>>
>>Chuming Chen
>>
>>    
>>
>
>If you mean in OWL Full, any RDF graph is a valid OWL Full graph, blank nodes
>and all.
>
>If you mean OWL DL or OWL Lite, then blank nodes (or, at least, something that
>would translate into blank nodes) are allowed in certain places, the most
>interesting being in the Individual construct.  In OWL DL and OWL Lite it is
>possible to leave out the ID in an Individual construct, so in addition to
>being able to say that John is a Person, via
>
>	Individual(John type(Person))
>
>you can also say that some object is a Person, via
>
>	Individual(type(Person))
>
>this anonymous object is just like a blank node.
>
>Look in the S&AS document 
>	OWL Web Ontology Language
>	Semantics and Abstract Syntax
>	http://www.w3.org/TR/2004/REC-owl-semantics-20040210/ 
>for more information.
>
>
>Peter F. Patel-Schneider
>
>
>
>  
>
In this case, how can we determine those blank nodes are equivalent when 
they appear in two OWLs?

Thanks,

Chuming Chen

Received on Sunday, 19 March 2006 17:18:54 UTC