Dear Mihnea-Costin, once again, thanks for your work on this. Also thanks for Marco Schmidt. As bad luck would have it, I now realize that I made a few grammar mistakes; those can be fixed once we all agree on a problem statement. Also, at least in part due to my own oversight when re-reading the final draft, there are two other points which didn't make it into this text: * There is no way to ensure that what authors send in is exactly, i.e. no more, no less, what makes it into new versions. * There is no canonical way to keep an up to date local copy of all documents As they are not part of the draft, I would appreciate a distinct +/-1 on both of them from anyone who comments so we can judge if they should be included. Thanks to anyone who reads this and cares to answer, Richard