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[protege-owl] About webprotege, I need your help~~

Jack Elliott jack.elliott at
Tue Nov 9 16:30:33 PST 2010

Hi Rainbow,

> For the second question, I know that prompt can compare the two 
> file-based project, but when I save all the data in database, How can 
> I check the changes make by different users?
We think that you will need to enable the ChAO and use the UsersTab 
view. To enable the ChAO, open your database project in the Protege 
client and click on Collaboration -> Show Collaboration Panel. You will 
be prompted for where you would like to create the Changes Ontology. 
Give the information you would like for the database, but also take 
careful note of where you save the pprj file. [1] Note that pprj files 
are created by default in the same directory as the original pprj file 
and are usually called annotation_OriginalProjectName.pprj.

You will now need to enable the multi-user mode, because you're running 
Protege as a server. Start by logging onto your Protege server in 
Administration Mode and creating a new Project instance. Set the 
location of the project instance to the newly created annotation pprj 
file. [2] Now, still in Administration Mode, go to the instance of your 
original project and set the AnnotationProject property (far to the 
bottom of the screen, you may need to enlarge the Server Administration 
Panel) to point to your newly created annotation project instance. [3]

Change tracking is now enabled - all the changes made to your original 
project will be stored in your newly created annotation project. To 
visualize these changes grouped by user, reopen the Protege client and 
enable the UsersTab (Project -> Configure and check the box labeled 




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