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In Section 13.1.3 I find this paragraph: -- Every implementation must recognize the collation URI that must http://www.w3.org/2005/xpath-functions/collation/codepoint, which provides the ability to compare strings based on the Unicode codepoint values of the characters in the string. -- Something is clearly wrong with the text :-) I'd suggest: -- Every implementation MUST recognize the collation URI http://www.w3.org/2005/xpath-functions/collation/codepoint, which provides the ability to compare strings based on the Unicode codepoint values of the characters in the string. --
Many thanks, fixed.