Export the history of a document

Export the history of a document

It would be cool to have a way of exporting the entire history of a document. I'm not sure in what format, or whether there is a conventional way of doing it (the ODF as functionality for it though).

I prefer to keep as much as I can versioned, whether that be Open Office, SVN, or MediaWiki and I'd like the documents I put together with Zoho Writer to be exportable with their complete version history, I guess for completeness.