Quote:
Originally Posted by cybmole
I call it archiving.
versioning is wanting two or more files of a given format, not one of each.
this is not versioning, it's diversity 
1 x file.original_epub
1 x file.epub
1 x file.mobi
1 x file.azw
with all 4 selectable as source formats for conversion
versioning would be
file at date a.epub
file at date b.epub
....
the original_FMT files behaves like an archive format in most instances already e.g. it cannot be opened in calibre viewer, or in calibre editor.... |
versioning.
1x book.epub
1x book.old-version_epub
Play the semantic games all you want, I don't really care. You have two versions of one format (as can be ascertained by examining the contents and finding an EPUB).
Regardless of whether you call it versioning or archiving, you will get no help from calibre. Because calibre is not meant to do it. So any degree to which calibre does so anyway is to be taken as a blessing.
Adding new features -- because that is what this is -- is something to treat as... <drumroll>... a Feature Request!
Regardless of how *
reasonable* you think it is, the fact remains that Kovid rejected your request -- and really, I agree with that decision.
And again, it seems like the root of the problem is your desire for a customized EPUB per device. Leaving aside the issue of how wrong that mindset is (ask the people who literally make their living off EPUB design), calibre does not support this.
Why not just make a different database record for each of your versions?