RE: [Tm4j-developers] TMQL

[Kal A. <ka...@te...>]

There is currently no spec for TMQL. The TMQL working group are still in the
process of gathering requirements, so don't expect anything from that effort
any time soon. Empolis and Ontopia have both developed and presented
demonstrations of topic map query languages, though I don't believe that
either company have published a specification that could be implemented
against.

I quite like the approach taken by Ontopia with their "tolog" query
language[1] - as the name suggests, it uses a Prolog-style query language. A
similar approach was taken by FourThought with their RDF Inference Lanuage
(RIL)[2] and I think that this kind of approach suits applications which
want to discover new relationships in a topic map. Other, more
straightforward querying could be implemented with an SQL-style syntax
(which is the approach taken by Empolis and by RDF query languages such as
SQUISH[3]).

Cheers,

Kal

[1] http://www.ontopia.net/topicmaps/materials/tolog.html
[2] http://rdfinference.org/ril/about.html
[3] http://swordfish.rdfweb.org:8085/rdfquery/squish.html

> -----Original Message-----
> From: tm4...@li...
> [mailto:tm4...@li...]On Behalf Of Gerd
> Mueller
> Sent: 16 July 2001 08:23
> To: tm4...@li...
> Subject: [Tm4j-developers] TMQL
>
>
> Hi,
>
> Is there a spec of TMQL or any other query language for Topic Maps?
> And if so what about an implementation within TM4J ?
>
> Best Regards,
> Gerd
>
> --
> ________________________________________________________________
> Gerd Mueller                                    ge...@sm...
> SMB GmbH                                  http://www.smb-tec.com
>
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