[news.eclipse.modeling.gmf] check a property while reading file

[Martin Jacob <mj@xxxxxxxxxxxxxx>]

Hi,

I want to check an property of an element while reading the file and generating the diagram. Where 
is the hook I can start? I am looking for a hint from some one who know the process while reading 
the file.
Or may be I can use a feature in GMF while opening a diagram and set some constrain?

My problem is that another tool is generating the xmi file. The xmi file contains a version. I need 
to check whether the version of the generated file fit to my diagram plugin.

thanks for any hint,	Martin