Cooperation in a shared workspace may mean that documents are edited by several authors and revised repeatedly. To maintain a history of the changes the authors can put their BSCW documents under version control.

The contents of a document under version control are not simply overwritten, but each time modifications are made, a new version is created as the current version.

Earlier versions are preserved; their sequence identified by increasing version numbers (e.g. 0.1, 0.2, 0.3 etc.). You may access them via the document's info page (see 4.6) or directly via a URL with a version number (see 4.8.5).