When you use zope external editor with some features, you can have great issues:

• if history is enabled on file content type, you don't want that an history entry is generated each time user saves the document during the same external edition session
• idem if you have enabled document viewer generation on each update, you want it to be done at the end of the session

That's what this product is dedicated to.

• This creates a policy version_on_unlock : the content history is not saved at edition when you are in a webdav session, but at onlock.
• The document viewer will be regenerated each time it is modified excepted if you are in a webdav session : it will be regenerated at unlock. REMOVE AUTO CONVERT OPTION on documentviewer control panel.