change tracking extension

[Peter Rakyta <rakyta.peter@multiracio.hu>]

Dear TC members!

As you might know, I develop an extension implementing the merge enabled 
change tracking proposed by Svante. Recently I have made further 
progress in the development. However I would like to address several 
questions in order to bring closer the specification and implementation.

-- I have uploaded an odt 
(https://www.oasis-open.org/committees/document.php?document_id=52714&wg_abbrev=office) 
containing the currently supported change types with simple user cases 
of the related xml tags in the undo.xml. I would like to ask you to 
revise these tags. Regarding style changes I kept the possibility of 
representing them explicitly in the xml, since automatic style names are 
still unreachable through the UNO, and the user-generated styles are not 
enough to thoroughly track style changes. (In the linked odt both 
bold/italic textparts correspond to the same "text body" style.) Hence I 
suggest to keep this possibility also in the standard. What do you think?

-- I think in order to get usable change tracking system, we need also 
to export data on the author, creation time, and other metadata (like a 
comment). May be these data should be also a part of the specification 
to ensure different implementations would handle these data the same 
way. What do you think? Currently my extension makes revisions of a 
document, means, that particular OTs (changes) are grouped under 
changesets (like an SVN). (An example for the XML representation of a 
changeset is also shown in the linked odt.)

Best Regards,
Peter