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[protege-discussion] Attaching data to classes and querying it

Samson Tu swt at
Wed Apr 2 12:07:16 PDT 2008


You need to create your own metaclasses so that you can attach 
class-specific information and query for them. See [1] and subsequent 
pages on creating metaclasses and instances of metaclasses. The basic 
idea is that a class is an instance of some metaclass, just as normal 
instances are instances of classes. So you can treat classes as 
instances if they are instances of appropriate metaclasses.


Terence Fitzgerald wrote:
> Hello All,
> I am a new user of Protégé-Frames 3.3.1.
> My question has two related parts:
>    1. Is there a way to attach specifically labeled data to a class
>       term?  Using the wine ontology as an example, say I wanted to add
>       a unique ID code field to each class term, such as Pauillac or
>       Bordeaux, as well as URLs pointing to a Web pages my company built
>       about each class of wine.  How would such data to my classes in
>       dedicated fields other than “Documentation”?
>    2. Imagine that my wine class hierarchy contains thousands of terms. 
>       How do I run a query that produces a list of class terms that have
>       common attached data, such as common URLs?  The existing query tab
>       runs queries that produce lists of instances that fulfill the
>       parameters of a query.

Samson Tu                                   email: swt at
Senior Research Scientist                   web:
Center for Biomedical Informatics Research  phone: 1-650-725-3391
Stanford University                         fax: 1-650-725-7944

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