Re: [TM4J-users] tolog queries

[kal <ka...@te...>]

Hi Stefan

Ste...@sw... wrote:

> Hi
>
>  
>
> I have the following two questions using tolog:
>
>  
>
> [1]
>
> I would like to define a topic like "status-of/has-status" or 
> "father/son", means with a slash in its name. Wouldn't it possible to 
> query an association which is a instance of such a topic? E.g. select 
> $A from father/son($A,$B) ?
>
>  
>
> Is there a way to tell the parser that this slash is part of the name?
>
You should not be able to use a slash as part of the ID of a topic - the 
ID should match the production for an XML ID (which only allows letters, 
numbers and a small range of other characters). So that means that you 
cannot use the slash character in that way. You can use an underscore 
character, so father_son and status-of_has-status are allowed. Most of 
the time I choose a single name e.g. has-status or parent-of

>  
>
> [2]
>
> In test classes of tm4j-0.9.4 I found the following query:
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>  
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> select $A from i\http://www.topicmaps.org/xtm/1.0/core.xtm#class-instance\
>
> (shape:i\"http://www.topicmaps.org/xtm/1.0/core.xtm#class\",
>
> $A:i\"http://www.topicmaps.org/xtm/1.0/core.xtm#instance\") ?
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>  
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> I think such a query works with local files as well. Which syntax I 
> have to use? Select $A from i\"file:///c:/myTM.xtm#test\"($A,$B) ?
>
>  
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> I got always the same error: TopicMapRuntimeException->Cannot find 
> topic with subject indiciator..
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>  
>
>  
>
The i"<uri>" means that the quoted uri is treated as a subject indicator 
to lookup the topic. If you have a topic with ID "test" in the file 
"myTM.xtm", then you can look it up by its *source locator* which 
requires you to use s"<uri>". For more on this, see the Ontopia tutorial 
for tolog (the section is 
file:///C:/kal/dev/oks-professional-2.0.3/doc/query/tutorial.html#sect-topic-ref).

Cheers,

Kal