Re: [DL-Learner discussion] How can I delete some examples?

[Jens L. <le...@in...>]

Hello Luu Tien Dao,

Luu Tien Dao wrote:
> 
> Dear all,
> 
> I’m beginner in Protégé DL-Learner Plug-in. Now I test with trains.owl
> file in the example folders. I want only 5 positive examples (east1,
> ...) and 5 negative examples (west1, ...). How can I delete some
> examples? (See the attach file). Thank you for your answer.

It is not possible to delete negative examples within the Protege
plugin. One needs to distinguish between different use cases of
DL-Learner: One use is to learn from explicitly given positive and
negative examples and another one is to assist knowledge engineers in
building up ontologies. The Protégé plugin specialised on ontology
engineering, i.e. it tries to find a class expression matching the
existing instances of a given class. In this setting, negative examples
are not readily available. As a first approach in plugin version 0.1 we
decided to declare all remaining objects in the knowledge base as
negative examples. The current plugin version (under development) uses a
different improved technique and there probably won't be an example
selection widget anymore. If you like, we can send you the development
version of the plugin so you can try it (as usual it is just a jar file
you need to put in your Protege plugin folder).

Apart from the Protege plugin, there are also different ways to access
DL-Learner. We are currently preparing a small manual (draft status),
which I can also send you if you are interested. It is a short
description of everything you need to know to get started.

Kind regards,

Jens Lehmann

-- 
Dipl. Inf. Jens Lehmann
Department of Computer Science, University of Leipzig
Homepage: http://www.jens-lehmann.org
GPG Key: http://jens-lehmann.org/jens_lehmann.asc