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[protege-discussion] Enable Journaling in Project Options?

Tania Tudorache tudorache at
Thu Apr 17 17:52:22 PDT 2008

The journaling option will create a journal file (with the extension 
"pjrn") in the same directory as your pprj file that will contain a log 
of all the creation operations in the ontology. The log is pretty 
verbose, so if you have many write operations, you may see a performance 
hit. Just for the normal UI operation, it will be fine. But, if for 
instance you have a plugin that generates 10000 classes and 2000 slots, 
probably it will run slower because of the journaling.

What is the reason you want to use the journaling? If you want to track 
the changes in the ontology, you may consider the Changes Tab [1] or 
Collaborative Protege [2], which are distributed with the Protege 



Jonathan Carter wrote:
> Hi everyone,
> I can't find any documentation on exactly what the 'enable journaling' 
> option does.
> So, just a quick question to see whether there is anything I should be 
> aware of before I turn on the 'Enable Journaling' option in my 
> project? My project is stored in a MySQL database - will this have any 
> impact or effects? Or is it irrelevent when using a database to store 
> the project?
> Thanks very much for your help
> Regards
> Jonathan
> __________________________________________
> Jonathan Carter - Head of Technical Architecture
> Enterprise Architecture Solutions Ltd
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