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

[Samson Tu]

Terence,

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.

[1]http://protege.stanford.edu/doc/users_guide/classes/metaclasses/metaclass_intro.html


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 stanford.edu
Senior Research Scientist                   web: www.stanford.edu/~swt/
Center for Biomedical Informatics Research  phone: 1-650-725-3391
Stanford University                         fax: 1-650-725-7944