Output-version attribute in XSLT 2.0

Hi list

In the XSLT 2.0 Candidate spec, the "output" element can have a "version"
attribute.
http://www.w3.org/TR/xslt20/#serialization,

In the same spec, the "result-document" element can have an "output-version"
attribute and not a "version" attribute.
http://www.w3.org/TR/xslt20/#creating-result-trees,

Both in XMLSpy and in Oxygen we have both "version" and "output-version" as
intelli-sense for the "result-document" element.

My questions:

1) Is there a typo in the spec?
2) Do we have both a "version" and an "output-version" attribute?

Best regards,
Jesper Tverskov