Where file revisions are stored on OS X? Most Apple applications in newer OS X versions, like OS X 10.9, automatically save all changes to all files and documents without your approval, and file versions and revisions are automatically available from within a submenu within the File menu.

Where are such revisions saved, filesystem-wise?

If one is to exchange such files, how would one ensure that none of the history gets exchanged, too?

What if one did want to exchange the history, is there a way to accomplish that as well?
Versions are stored within the same file so a myfile.pages will have all there versions stored within it.

A version is only stored when you save from the file menu or use cmd- S

The version is just a bit of text that details the changes made since the last version so is not a copy of the file at that stage.

So if you sent the file to someone else they should get all the previous versions as well.