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[protege-discussion] Experimental XML Merging Included Projects

Jonathan Carter jonathan.carter at
Thu Dec 20 09:23:57 PST 2007

I would agree with Samson on this.
The XML format is great for exporting the project but hacking it about to
merge projects is 'experimental' to say the least.

However, I have managed to merge projects (e.g. 2 projects that have the
same Classes (.pont file) but different instances (.pins file) that I want
to bring together by manipulating the PINS file to create a new union of the
instances. I suspect that you could achieve good results by merging the PONT
files too.

In my experience, the PINS and PONT files are the most robust format for the


Jonathan Carter - Head of Technical Architecture
Enterprise Architecture Solutions Ltd

Assess your EA maturity at:

-----Original Message-----
From: protege-discussion-bounces at
[mailto:protege-discussion-bounces at] On Behalf Of Samson
Sent: 19 December 2007 23:38
To: User support for Core Protege and the Protege-Frames editor
Subject: Re: [protege-discussion] Experimental XML Merging Included Projects

Merging xml-format projects clearly has problems. In my experiment, with all
projects in the same directory, merging included projects and saving
  results in an empty project when I re-open the project again.


Nickolay wrote:
> Hello,
> I'm having trouble merging two XML-format project within Protege 3.3.1.
> I'm performing the following steps.
> 1. Create and save a new XML/pprj project Foo 2. Include projects 
> Part1 and Part2 (both in xml/pprj format) by using "Manage Included 
> Projects"
> 3. At this point I see all the classes from both Part1 and Part2 show 
> up, so I use "Merge Included Projects" to "activate" them.
> 4. I save Foo
> When I open Foo again I see a ton of WARNING: unknown class errors for 
> all my classes, and the project opens up blank.
> The projects Part1, Part2 and Foo are in separate directories. 
> Any insight as to where I'm screwing up is greatly appreciated.
> Thanks!
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Samson Tu                                   email: swt at
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