Re: [topicmaps-comment] mapping topic maps on a relation database

[Murray Altheim <m.altheim@open.ac.uk>]

Lars Marius Garshol wrote:

> * Lars Marius Garshol
> |
> | This sounds very interesting. What API do you intend for Ceryle to
> | provide? An XPath-based one, or something like the "standard" TMAPI?
> 
> * Murray Altheim
> | 
> | I'd appreciate if someone could point me to TMAPI, as I'm not sure I
> | know what you're referring to.
> 
> It's basically a joint project between Kal Ahmed (who started it),
> Graham Moore, me, and Geir Ove Grønmo. I'm quite pleased with what
> we've come up with so far:
> 
>   <URL: http://tmapi.sourceforge.net/ >


I'll take a look. Thanks. 
 
> BTW, how far did you get with TouchGraph visualization? I tried it out
> myself briefly (a 1-hour Jython hack on top of our engine), and while
> it did very well for small topic maps (5-40 topics) it didn't do at
> all well for larger things like the Italian Opera topic map. 
> 
> Have you been able to get round that problem somehow? (I have some
> ideas about how to do it, but would be curious to hear yours.)


Send me the LTM file and I'll see what it does. As I mentioned,
merging isn't completely functional (eg., it currently doesn't
merge associations at all, or topics playing the same role in
associations), but it does do most.

As for size, I've hit limits on memory before there's real problems.
I've opened up ITIS files with hundreds of topics, so there shouldn't
be a problem with 5-40.

[I'd hoped to have Ceryle ready for release this week, but it's looking
now like next week... still some missing functionality and a few bugs
I want to kill before a first viewing.]

Murray

......................................................................
Murray Altheim                         <mailto:m.altheim @ open.ac.uk>
Knowledge Media Institute
The Open University, Milton Keynes, Bucks, MK7 6AA, UK

      In the evening
      The rice leaves in the garden
      Rustle in the autumn wind
      That blows through my reed hut.  -- Minamoto no Tsunenobu