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[protege-discussion] question about 'using protege forms in other appications'

Samson Tu swt at
Fri Mar 2 08:42:44 PST 2007

For one thing, if you are using Protege Frame (i.e., not OWL), the 
instances are stored in the .pins file, not .pprj file.


Yun Lin wrote:
> Hi,
> I would like to use Protege forms in my own applications. I followed the 
> example listed at 
> <>. 
> The project was created by Protege 3.2.1 and the instance name is from 
> the .pprj file. However, the application runs with error:
> Exception in thread "main" java.lang.NullPointerException
>     at (
>     at protegepack.ExternalApp.main(
> That is to say, the instance is 'null'. I am not sure if I use correct 
> instance name. But I tried some of instances in the .pprj file, the 
> results are same. Could you tell me what is wrong with the code and how 
> to read the .pprj file structure?
> Thank you in advance!
> Yun Lin
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Samson Tu                    email: swt at
Senior Research Scientist    web:
Stanford Medical Informatics phone: 1-650-725-3391
Stanford University          fax: 1-650-725-7944

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