Re: http://ld2sd.deri.org/lod-ng-tutorial/

On 22/6/09 23:16, Martin Hepp (UniBW) wrote:
>
>
> Yves Raimond wrote:
>>> Ontology modularization is
>>> a pretty difficult task, and people use various heuristics for deciding what
>>> to put in the subset being served for an element. There is no guarantee that
>>> the fragment you get contains everything that you need.

> There is no safe way of importing only parts of an ontology, unless you
> know that its modularization is 100% reliable.
> Serving fragments of likely relevant parts of an ontology for reducing
> the network overhead is not the same as proper modularization of the
> ontology.

Can you give a concrete example of the danger described here? ie. the 
pair of a complete ("safe") ontology file and a non-safe subset, and an 
explanation of the problems caused.

I can understand "there is no guarantee that the fragment you get 
contains everything you need", and I also remind everyone that 
dereferencing is a privilege not a right: sometimes the network won't 
give you what you want, when you want it. But I've yet to hear of anyone 
who has suffered due to term-oriented ontology fragment downloads. I 
guess medical ontologies would be the natural place for horror stories?

cheers,

Dan