> Subversion doesn't define the term "project".
  And that's it! Thank you, Uli.

  You see [see also my former post: “Subversion Repository: naturally a single- or multi-Project versioning storage?”], I'm currently engaged with a project of Test & Documentation of the “versioning” feature (i.e. Subversion) integrated into the Eric (4) Python IDE, and I'm facing the fact that, while Eric has a very well defined Project concept, Subversion, clearly, hasn't.
As simple as that.

Thank you again for you clarifying and convincing consideration.

All the best. Yours,

 - P.M.