On Mar 25, 2014 12:31 AM, "apoh...@o2.pl" <apoh...@o2.pl> wrote:
>
>
>
> ---- Wł. Pn, 24 mar 2014 23:31:33 +0100 Jona Christopher Sahnwaldt<
j...@sahnwaldt.de> napisał(a) ----
>
>> On 24 March 2014 22:57, apoh...@o2.pl <apoh...@o2.pl> wrote:
>> > Hi Jona,
>> >
>> > I just want to make one thing clear - if either domain or range has a
>> > owl:Thing "constraint" you don't export that information to the
dbpedia.owl?
>>
>> That's right. We could fix that with a bit of effort.
>>
>> When we build the (in-memory) ontology properties from the mappings
>> wiki, we use the default value owl:Thing if there's no domain [1] or
>> range [2]. That's necessary because domain and range must not be
>> empty. But it also means we don't distinguish between missing values
>> and explicit owl:Thing values. That's the root of the problem.
>>
> Well, but for data type property the returned value is None if the
definition is absent.
What do you mean by that?
> So it seems that leaving the value as None in case of missing constraint
could do the thing.
> I am just guessing here, since my knowledge of DBpedia mapping source
code is near to zero. Still, I could do some testing, if I only knew how to
build and run the mapping code.
>
>
> Cheers,
> Aleksander
>
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