Which XQuery WD does QuiP support?

I noticed that http://developer.softwareag.com/tamino/quip states for the 2.2.1 release:

“Grammar updated to April 2002 working draft”

and below, when describing QuiP, it states:

“Syntax conforming to the working draft of XQuery of December 20th, 2001.”

Are both refering to the XQuery WD? If so, which is correct?

Hi Mark,

with the 2.2.1 release the grammar was
updated to the April 2002 working draft.