OASIS Mailing List ArchivesView the OASIS mailing list archive below
or browse/search using MarkMail.


Help: OASIS Mailing Lists Help | MarkMail Help



   Re: [xml-dev] Interesting nodes are anonymous, was: Re: [xml-dev] Meta-s

[ Lists Home | Date Index | Thread Index ]

Didier I want to discuss the differences between my example and yours a 
bit more:

I started with:

<Person xmlns="http://example.org/ex";>
	<SSN rdf:resource="uuid:ssn:1112223344"/>
			<hasAddress>1234 West Ridge Road</hasAddress>

and Didier then asked about (simplified):

<object xmlns="http://example.org/ex";>
	<SSN rdf:resource="uuid:ssn:1112223344"/>
			<hasAddress>1234 West Ridge Road</hasAddress>

Using OWL what can we tell about this <object>

First let's define <SSN>

<owl:InverseFunctionalProperty rdf:ID="SSN">
	<rdfs:domain rdf:resource="#Person" />
	<owl:inverseOf rdf:resource="#SSNof" />

and now suppose there is more information somewhere else.

<rdf:Description rdf:ID="Jimmy">
	<SSN rdf:resource="uuid:ssn:1112223344" />

OK, now we can make the inferences:

_:1 rdf:type ex:Person .
_:1 owl:sameIndividualAs ex:Jimmy .

that is, because these "objects" share the same SSN (which is an 
inverse functional property) we know that

a) they are identical, hence the formerly blank node can be labeled 
with the URI
b) the anonymous node is of type "Person" (because the domain of SSN is 

So a *huge* difference between syntactic schemas (DTDs, RELAXNG, XSD) 
and Ontologies is that syntactic schemas restrict the syntax that they 
are valid with respect to, where as an ontology allows the system to 
make inferences about what we are talking about.



News | XML in Industry | Calendar | XML Registry
Marketplace | Resources | MyXML.org | Sponsors | Privacy Statement

Copyright 2001 XML.org. This site is hosted by OASIS