[Review] Conformance in XML signature

Dear editors,

thank you for your work about XML Signature
http://www.w3.org/TR/2001/CR-xmldsig-core-20010419/

I encourage you to add a clear conformance section in your document 
that will define in which terms you define the conformance of 
implementations and documents before PR.

See for example SVG
	http://www.w3.org/TR/SVG/conform.html

Thank you.

-- 
Karl Dubost / W3C - Conformance Manager
           http://www.w3.org/QA/

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