Re-definition of W3C element (ODF 1.2 Part 3 Draft 12)

Dear all,

According to http://www.w3.org/TR/xmldsig-core/ the Signature element
may have at most an ID attribute and a specified possible set of
sequences of child elements.

ODF re-defines the W3C's definition of their element in their Namespace,
allowing any attributes and any children.

W3C states "Implementation MUST generate laxly schema valid [XML-schema]
Signature elements as specified by the following schema".

- Alex.