Re: [xtm-wg] An Approach to the Semantic Web

["H. Holger Rath" <hhr@step.de>]

Danny Ayers wrote:
> 
> >tools available for queries.  For XTM, the benefit may come from the
> >easiness for semantic discovery and enrichment (e.g., discovering
> >topics and adding associations).
> 
> I'm not yet very familiar with topic maps, are you saying that there are
> tools already available for XTM for discovering topics and adding
> associations?

Check http://k42.empolis.co.uk/

empolis implemented its draft of the Topic Map
Querly Language TMQL in its XTM product k42.
Even more powerful is the JAVA API of the engine -
it provides read/write/update access to the complete
TM on the conceptual level of XTM. You can get a 
free download at the mentioned URL.

Here is an example how (empolis) TMQL works:

In natural language: 
	Which operas were composed by Germans 
	influenced by Mozart?

In more formal style:
	All topics of type "Opera" 
	which were composed by "Persons"
	which were influenced by "Mozart"
	and born in "Germany"?

eTMQL:
	SELECT topic x WHERE
	 x instance_of topic named "Opera"
	AND
	 x in (assoc template_is assoctemp named "composed by") has
	 topic person instance_of topic named "Person"
	AND
	 person in (role named "influenced person") in
	 (assoc template_is assoctemp named "influenced by") has
	 (role named "influencing person") has topic named "Mozart"
	AND
	 person in (assoc template_is assoctemp named "born in") has
	 topic named "Germany"

--Holger

-- 
Dr. H. Holger Rath <holger.rath@empolis.com>
empolis content management GmbH
Havelstr. 9, 64295 Darmstadt, Germany
http://www.empolis.com/ -- mobile: +49.172.66.90.427
phone: +49.6151.380.292 -- fax: +49.6151.380.488

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