How to capture the model version number?

Hi,
I am working on a M2Doc template and by now I have almost all necessary information needed for the generation. The last piece is the document version that I would like to contain in the Capella model.
The version number is a convention used at our company and is rather simple: starting from 0.1 it increases till some release status is reached, then the number is advanced to 1.0 and the story continues.
So what I am looking for is a single place in the model where I could add such field. Should I use a custom property for it or is there a place in Capella to store such information?

Marcin

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