Re: [tinyTiM-discuss] Fwd: importing/exporting RDF

[Lars H. <he...@se...>]

Hi Lukas,

[...]
> Isidorus (when the mapping concepts are not absolutely different). So I
> started to import data with tinyTiM - but importing RDF/XML reqieres a
> mapping-schema. Are any example schemata existing?

No, the schema is always source-dependent. One could define a standard
mapping which maps the RDF type statement to the tmdm:type-instance
association, but this is not done yet. The RDF readers implement the
RTM mapping described at [1].

> Is it possible to import "normal" RDF/XML files without predifend schemata?

No, since the RDF importers are forced to ignore all statements for
which no mapping is defined, the resulting topic map would always be
empty.

If Isidorus supports CXTM, you can use the CXTM tests provided by the
CXTM test suite [2]. Note, that the last release does not contain the
RDF tests, you have to use the the trunk [3].

All RDF tests are self-contained, which means that the mapping is
defined within the RDF source.


> What's about exporting Topic Maps as RDF/XML - I didn't find a 
> Class/Interface which is able to export TM as RDF/XML?

tinyTiM does not contain any RDF writer yet. I don't have any plans to
write one, since the demand seems to be non-existent. If there are
enough requests, I'll write one. Ontopia provides a RDF/XML writer,
though.


[1] <http://www.ontopia.net/topicmaps/materials/rdf2tm.html>
[2] <http://cxtm-tests.sourceforge.net/>
[3]
<http://cxtm-tests.svn.sourceforge.net/viewvc/cxtm-tests/trunk/rdf/>

Best regards,
Lars
-- 
Semagia 
<http://www.semagia.com>