The W3C XML Query and XSL Working Groups has updated the Candidate Recommendation XQuery 1.0 and XPath 2.0 Data Model (XDM). The changes since the last draft don't feel too huge.
The W3C XQuery working group has also posted the third working draft ofXQuery Update Facility. XQuery as it currently exists is basically just SELECT in SQL terms. This is INSERT, UPDATE, and DELETE. More specifically it is:
upd:mergeUpdates
upd:revalidate
upd:applyUpdates
Update Primitives
upd:insertBefore
upd:insertAfter
upd:insertInto
upd:insertIntoAsLast
upd:insertAttributes
upd:delete
upd:replaceValue
upd:rename
Changes in this draft appear to be primarily editorial.