[Gimp-docs] "make validate" and <revnumber>

[julien]

Hi,

I get a validity error if I remove the <revnumber> tag from  the revhistory.
In spite of the DocBook-2.0.17: (revnumber?,date,...
But in the DocBook-2.0.12, we had: (revnumber, date,...

Is "validate" based on an old version of Docbook?

(I thought I had resolved the problem we discuss a few days ago by
adding a <revremark> tag :-(  ).

Julien

Julien