please find below my revised proposal regarding the version attribute in
All root elements take an office:version attribute, which indicates
which version of this specification it complies with.
An application that stores a document conforming to this application
*shall* use the attribute value "1.2".
In older versions of this specification, the attribute could take the
values 1.0 or 1.1, or the attribute could be omitted.
If an application processes a document with an attribute value "1.0"
it *may* assume that the document conforms to the OpenDocument v1.0
If an application processes a document with an attribute value "1.1"
or no office:version attribute, it *may* assume that > the document
conforms to the OpenDocument v1.1 specification [ODF11].