Re: [cmunell] NELL license and relicensing + NELL in RDF

[Bryan Kisiel]

Hi Antoine,

This sounds like good news -- please feel free to link it here for all who
might be interested!

I'm not going to say that there is no license at all for what NELL
produces because the university lawyers probably have some kind of
framework in place for limiting our liabilities and protecting our
intellectual property and things like that, but the general idea is that
the data produced by NELL is free for the world to use and to reproduce.
In fact, we tend to be focused on generating the KB than using it, and so
we're always happy to hear about people finding uses for it. (To this
end, we also very much welcome feedback and suggestions to help make
NELL's output more useful.)

As for the ontology files, thanks for noticing the bug! The missing
generalizations are now present.

bki...@cs.cmu.edu


On Wed, 27 Mar 2013, Antoine Zimmermann wrote:

> With some colleagues, we have translated NELL's data into RDF, and NELL's
> ontology in OWL. We set up a SPARQL endpoint with which to query the data.
> We want to publish this and make our RDFised dataset available for download
> under an open license.
> However, as far as I can tell, there is no license attached to NELL's
> dataset.
>
> First, do you allow us to use your data and republish them in a different
> format (with acknowledgement of course)?
> Second, what kind of license would you allow us to attach to our own
> dataset?
>
> BTW, the ontology that you make available for download does not contain the
> property hierarchy. There are generalizations links between classes, but
> not between properties, whereas such relations exist in the KB browser
> online. It would be good to make them available too.
>
>
> Best,
> AZ
>
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[Matías Parodi]

Hello,

So far I couldn't find where the SPARQL endpoint is. Is it already available?

Thank you,

Matt

[Christophe Gravier]

Dear all,

I'm one of Antoine's co-worker on this.

You can find the project homepage at : http://nell-ld.telecom-st-etienne.fr/

And the associated Sparql endpoint : http://nell-ld.telecom-st-etienne.fr/sparql

If you want to browse interactively using SPARQL, you can access the provided snorql instance: http://nell-ld.telecom-st-etienne.fr/snorql/

Sorry for the late reply,

Christophe

[Rafael Miani]

Hi Christophe, how are you?

I am trying to use the NELL´s ontology and instances that your group provided.

I did not have any problem on using NELL.08m.690.ontology.ttl ontology on Protégé.

But i am not able to use the instances on it (NELL.08m.690.instances.ttl). 

It gives a Java heap space problem.

Did you face it before?

Regards

Rafael Garcia Leonel Miani

IFSP - Campus Votuporanga

2013/9/5 Rafael Miani <rafa...@gmail.com>

Hi Christophe, how are you?

I am trying to use the NELL´s ontology and instances that your group provided.

I did not have any problem on using NELL.08m.690.ontology.ttl ontology on Protégé.

But i am not able to use the instances on it (NELL.08m.690.instances.ttl). 

It gives a Java heap space problem.

Did you face it before?

Regards

Rafael Garcia Leonel Miani

IFSP - Campus Votuporanga

2013/9/4 Christophe Gravier <cgravi...@gmail.com>

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[Rafael Miani]

Hi Christophe, how are you?

I am trying to use the NELL´s ontology and instances that your group provided.

I did not have any problem on using NELL.08m.690.ontology.ttl ontology on Protégé.

But i am not able to use the instances on it (NELL.08m.690.instances.ttl). 

It gives a Java heap space problem.

Did you face it before?

Regards

Rafael Garcia Leonel Miani

IFSP - Campus Votuporanga

2013/9/4 Christophe Gravier <cgravi...@gmail.com>

Dear all,

[Christophe Gravier]

Hi Rafael,

Protégé loads the entire model (T-Box+A-Box) into memory.

Note that, in most cases and especially in nell-ld, the A-Box is larger by order of magnitudes than the T-Box (remember a little semantics goes a long way :))

Protégé is a Java program.

At runtime, a Java program (actually the JVM), is creating instances (instances like in OOP) and these are stored in the Heap space.

Because the NELL instances file is large, lots of corresponding Java instances are to be created in that memory space ("heap").

By default, the JVM is not "allwoed" to create so many instances in the heap space.

Fortuantely, you can override the default by giving additional parameter to the JVM : java -Xms128m -Xmx512m ... (and increase as needed if not enough).

More info on Oracle documentation : http://docs.oracle.com/cd/E19528-01/819-4742/abeik/index.html

Consequently, you need to edit your command line launching Protégé to insert these parameter after the "java" in your command.

How to do this varies depending on your OS (esit shortcut on Windows, Edit scripts file in MacOs/Linux).

Actually, we only browsed instances using Jena API (when programming), and a decent text editor (when reading), yet never tested using Protégé.

HTH

Christophe