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[protege-owl] Using PROMPT from own application

Timothy Redmond tredmond at
Tue Apr 13 08:16:13 PDT 2010

On 04/13/2010 06:48 AM, Maria Mitina wrote:
> Hi everyone,
> i am new to Protege and feeling a bit lost regarding
> the use of plugins.
> In my task i need to compare two ontologies from my own
> application in java.
> I found out that the results of comparosin by PROMPT are
> very close to what i
> need. But i cannot find any information on how to access
> PROMPT from my programme.

This type of thing has been done many times before (not with PROMPT but 
with Protege plugins in general).  The usual approach is to ignore the 
Protege plugin mechanism and simply make sure that all the needed jar 
files are on your classpath.  The main tab of prompt is defined by the 
wiki and is


If you don't want to use the main tab then you will need to tell us more 
and we will see if we can find the right entry point.

One issue with this use of prompt is that almost all its state is in 
static variables. This means that it is awkward to have more than one 
prompt run in the same jvm.  This is not insurmountable though - it may 
be possible to clear the prompt state and if not there is a trick that 
you can use involving class loaders.

> Do i need to use Protege-OWL API? Or is there the way to
> access PROMPT directly
> from java application sourcing pathes to my ontologies only?

If you are working with owl files then protege-owl.jar library will have 
to be on the classpath.  You will also need to figure out some way of 
loading the needed ontologies.  You might be able to use the Protege api 
to simply load the pprj files.


> If someone has experience of accessing PROMPT (or using a
> similar tool to
> compare ontologies) from their own programme, please, share
> it! I would really
> appreciate this!
> Thank everyone,
> Maria.
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