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From jeronimofernan...@yerbabuena.es
Subject Re: Global vision to adapt Apache Stanbol to a CMS system
Date Thu, 18 Aug 2011 08:37:40 GMT
Olivier Grisel <olivier.grisel@ensta.org> escribió:

> 2011/8/17  <jeronimofernandez@yerbabuena.es>:
>> Olivier Grisel <olivier.grisel@ensta.org> escribió:
>>
>>> 2011/8/17  <jeronimofernandez@yerbabuena.es>:
>>>>
>>>> Hi again,
>>>>
>>>> I've been looking the Dbpedia and DBLP examples, but actually i need to
>>>> define my own ontology with customised relations (not based in
>>>> definitions
>>>> of Dbpedia). I didn't explain my problem very well. I need to extract
>>>> tags
>>>> from plain text, yes, but i need to make inferences over my domain
>>>> (enterprise terms and concepts that are only used in a closed
>>>> environment).
>>>
>>> What kind of inference? Please give an example of sample input and
>>> expected output.
>>>
>>
>> Input -> PTS is a component of a product for cleaning mowers.
>> Inference -> PTS is a product for gardening (i defined this in a
>> hierarchical ontology, superclass).
>
> I don't get it: are the input and the output plain English text
> (natural language) or RDF. Please give an example with the exact input
> and output. Stanbol does not provide any component to generate natural
> language.
>

Yes, the output would be something like this:

Entity->PTS

And the system could establish an inference:

Entity->Product_gardening

>>>> Is there any way to upload my ontology previously defined in Protégé with
>>>> mimetype rdf+xml? I thought that when i uploaded the owl file to a
>>>> specific
>>>> scope in ontonet, i could configure Stanbol to use this ontology.
>>>
>>> What do you mean by "use"?
>>>
>>
>> I want that Stanbol "forgets" another source. I need that, in the plain
>> text, Apache Stanbol choose tags only defined in my ontology.
>
> You can configure the TaxonomyLinkingEngine to only point to use one
> of the EntityHub referenced sites (and not all of them). Alternatively
> you can unregister the configuration of dbpedia in the entityhub to
> globally disable it.
>

>> Example:
>>
>> I have a PTS but i don't have garden.
>>
>> Result:
>>
>> PTS->Component_for_mowers->Component_for_gardening
>>
>> Apache Stanbol don't extract "garden" because it isn't defined like an
>> entity (class) in my owl file or my own ontology.
>>
>>>> I've
>>>> already created this ontology. If it's not possible, what are the steps i
>>>> need to follow in Apache Stanbol to define own entities that Natural
>>>> Language Processing Engine can extract from plain text? And then, when
>>>> these
>>>> own entities has been extracted, how can i connect these entities with my
>>>> relations?
>>>
>>> What do you mean by "connecting entities with relations"?
>>>
>>
>> Relation:
>>
>> Maybe_must_buy: Gardener->Component_for_gardening
>
> So what you call a relation is a rule for a deductive reasoner?
>
Yes.
>> Example:
>>
>> I have a PTS. Peter is a gardener.
>>
>> Result:
>>
>> PTS->Component_for_cleaning_mowers->Component_for_gardening
>> Peter->Gardener
>> Peter Maybe_must_buy PTS
>>
>> Sorry for the example :). I expect you understand what i want to say.
>
> So if I understand correctly you want to do compute all the
> consequences (logical deductions) of the union of the logical facts
> extracted from the natural language text of the submitted content with
> a set of predefined rules registered on the Stanbol server.
>
> The main problem I see is that right now we don't have any enhancement
> engine in Stanbol able to semantically parse / interpret English
> language content to extract "facts" or "semantic assertions". We just
> have engines to extract occurrences of named entities and or non
> ambiguous domain specific terms. This is a very non trivial task and
> OpenNLP only provides some building block to implement this.
>

Thanks for your patience, Olivier.


> --
> Olivier
> http://twitter.com/ogrisel - http://github.com/ogrisel
>

--
Jerónimo Fernández
Yerbabuena SW


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