tm4j-users

[TM4J-users] typing topics

[Andrea C. <mai...@st...>]

Hi All, 
I have the following small problem, and I can't find an answer to it in the
programmer's guide: when I export a topic map to an XTM file, I see that in
the file the typing-topics of a certain topic are indicated in it by means
of their IDs. If the topic map is the result of a merge of several topic
maps, this causes problems, because many IDs of merged topics are
overwritten! 
I'd like to make use of the subject indicators of the typing topics (instead
of the IDs) in order to indicate the type of a topic. Is it possible? How
does it work?
Thanks!
Andrea
 

Re: [TM4J-users] typing topics

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

Hi Andrea,

When TM4J exports a topic map, all subjectIndicatorRef references to 
topics are converted into topicRef references - this is just the default 
behaviour of the XTM export code.

Right now there is no option to use subjectIndicatorRef where possible, 
but that could be added as a new feature. To implement it for yourself, 
you will need to override the behaviour in XTMWriter. Take a look at the 
method topicRef (about line 665) - this is invoked from various places 
in the XTMWriter code to write a <topicRef> element. You could modify 
this method to check if the the Topic in the parameter t has a subject 
indicator and if it does, call the ref() method to write a subject 
indicator ref (there is an example of this on line 678.

The important thing to note here is that even though TM4J's default 
behaviour is to "normalise" all references into topicRef references, the 
subject indicators in the original merged topic maps are preserved. 
Also, although the ID attribute values may get changed (especially when 
you merge topic maps), the original IDs are also preserved as full URLs 
in the sourceLocators property.

Hope this helps!

Kal

Andrea Carradori wrote:

>Hi All, 
>I have the following small problem, and I can't find an answer to it in the
>programmer's guide: when I export a topic map to an XTM file, I see that in
>the file the typing-topics of a certain topic are indicated in it by means
>of their IDs. If the topic map is the result of a merge of several topic
>maps, this causes problems, because many IDs of merged topics are
>overwritten! 
>I'd like to make use of the subject indicators of the typing topics (instead
>of the IDs) in order to indicate the type of a topic. Is it possible? How
>does it work?
>Thanks!
>Andrea
> 
>
>  
>

Re: [TM4J-users] typing topics

[Stefan L. <li...@no...>]

Hi Andrea,

There is already an implementation of the solution Kal proposed. I dunno=20
if you use the TMAPI Interfaces TM4J provides, but there is a project=20
called tmapi-utils[1] out there which contains an XTMSerializer, which=20
can be switched to do exactly that what kal proposes (using=20
subjectIndicatorRef instead of topicRef, if the typing topic has a=20
subject indicator).

Therfore you just have to call=20
XTMSerializer.setProperty("org.tmapi-utils.impexp.xtm.XTMSerializer.subje=
ctIdentifiersOnly",true);

feel free to contact me

Stefan

[1] http://tmapi-utils.sourceforge.net/


Andrea Carradori wrote:

> Hi All,
>
> I have the following small problem, and I can=92t find an answer to it=20
> in the programmer=92s guide: when I export a topic map to an XTM file, =
I=20
> see that in the file the typing-topics of a certain topic are=20
> indicated in it by means of their IDs. If the topic map is the result=20
> of a merge of several topic maps, this causes problems, because many=20
> IDs of merged topics are overwritten!
>
> I=92d like to make use of the subject indicators of the typing topics=20
> (instead of the IDs) in order to indicate the type of a topic. Is it=20
> possible? How does it work?
>
> Thanks!
>
> Andrea
>


--=20
My place : http://user.cs.tu-berlin.de/~lischke

R: [TM4J-users] typing topics

[Andrea C. <mai...@st...>]

Hi Kal, hi Stefan
I'm not using TMAPI, so, unfortunately, I couldn't make use of the
XTMSerializer. Anyway, I modified the XTMWriter, just as Kal proposed, and
it worked! This helped me very much in my work. Thank you very much!
By the way, I think it would be very useful if the possibility to use
subjectIndicatorRef where possible were implemented in the next versions of
TM4J, just like Kal wrote.

Thanks again!
Andrea


 

-----Messaggio originale-----
Da: tm4...@li...
[mailto:tm4...@li...] Per conto di Stefan Lischke
Inviato: Montag, 13. Dezember 2004 17:02
A: Andrea Carradori
Cc: tm4...@li...
Oggetto: Re: [TM4J-users] typing topics

Hi Andrea,

There is already an implementation of the solution Kal proposed. I dunno 
if you use the TMAPI Interfaces TM4J provides, but there is a project 
called tmapi-utils[1] out there which contains an XTMSerializer, which 
can be switched to do exactly that what kal proposes (using 
subjectIndicatorRef instead of topicRef, if the typing topic has a 
subject indicator).

Therfore you just have to call 
XTMSerializer.setProperty("org.tmapi-utils.impexp.xtm.XTMSerializer.subjectI
dentifiersOnly",true);

feel free to contact me

Stefan

[1] http://tmapi-utils.sourceforge.net/


Andrea Carradori wrote:

> Hi All,
>
> I have the following small problem, and I can't find an answer to it 
> in the programmer's guide: when I export a topic map to an XTM file, I 
> see that in the file the typing-topics of a certain topic are 
> indicated in it by means of their IDs. If the topic map is the result 
> of a merge of several topic maps, this causes problems, because many 
> IDs of merged topics are overwritten!
>
> I'd like to make use of the subject indicators of the typing topics 
> (instead of the IDs) in order to indicate the type of a topic. Is it 
> possible? How does it work?
>
> Thanks!
>
> Andrea
>


-- 
My place : http://user.cs.tu-berlin.de/~lischke



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