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Posted to users@jena.apache.org by ashutosh mehta <as...@gmail.com> on 2018/10/30 13:36:28 UTC
TDB structure
Hi,
Is there any documentation regarding TDB structure. How does it store owl
files(ontology)?
How does indexing happen in TDB?
Thanks
Kind Regards
Ashutosh
Re: TDB structure
Posted by ajs6f <aj...@apache.org>.
As I said, neither TDB component distinguishes between ontology triples and other RDF. Are you using the word ontology in some other sense?
How a given query is executed depends on a great deal of detail, including the form of the query. Perhaps you can explain more of the background to your question and we can give you a more useful answer...
ajs6f
> On Oct 30, 2018, at 12:02 PM, ashutosh mehta <as...@gmail.com> wrote:
>
> I meant TDB2.
> When a sparql query is made on the ontology, does only a particular node is
> hit or doea it traverse the graph from the beginning?
>
>
> On Tue, Oct 30, 2018, 7:10 PM ajs6f <aj...@apache.org> wrote:
>
>> For TDB1 (you don't say whether you mean TDB1 or TDB2):
>>
>> https://jena.apache.org/documentation/tdb/architecture.html
>>
>> OWL, to either TDB, is just more RDF. TDB makes no distinction between
>> ontology and instance data. Indexing is as described in the link above,
>> along with any additional text or spatial indexing you may have created by
>> using those Jena components.
>>
>> ajs6f
>>
>>> On Oct 30, 2018, at 9:36 AM, ashutosh mehta <as...@gmail.com>
>> wrote:
>>>
>>> Hi,
>>> Is there any documentation regarding TDB structure. How does it store owl
>>> files(ontology)?
>>>
>>> How does indexing happen in TDB?
>>>
>>> Thanks
>>> Kind Regards
>>> Ashutosh
>>
>>
Re: TDB structure
Posted by ashutosh mehta <as...@gmail.com>.
I meant TDB2.
When a sparql query is made on the ontology, does only a particular node is
hit or doea it traverse the graph from the beginning?
On Tue, Oct 30, 2018, 7:10 PM ajs6f <aj...@apache.org> wrote:
> For TDB1 (you don't say whether you mean TDB1 or TDB2):
>
> https://jena.apache.org/documentation/tdb/architecture.html
>
> OWL, to either TDB, is just more RDF. TDB makes no distinction between
> ontology and instance data. Indexing is as described in the link above,
> along with any additional text or spatial indexing you may have created by
> using those Jena components.
>
> ajs6f
>
> > On Oct 30, 2018, at 9:36 AM, ashutosh mehta <as...@gmail.com>
> wrote:
> >
> > Hi,
> > Is there any documentation regarding TDB structure. How does it store owl
> > files(ontology)?
> >
> > How does indexing happen in TDB?
> >
> > Thanks
> > Kind Regards
> > Ashutosh
>
>
Re: TDB structure
Posted by ajs6f <aj...@apache.org>.
For TDB1 (you don't say whether you mean TDB1 or TDB2):
https://jena.apache.org/documentation/tdb/architecture.html
OWL, to either TDB, is just more RDF. TDB makes no distinction between ontology and instance data. Indexing is as described in the link above, along with any additional text or spatial indexing you may have created by using those Jena components.
ajs6f
> On Oct 30, 2018, at 9:36 AM, ashutosh mehta <as...@gmail.com> wrote:
>
> Hi,
> Is there any documentation regarding TDB structure. How does it store owl
> files(ontology)?
>
> How does indexing happen in TDB?
>
> Thanks
> Kind Regards
> Ashutosh