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[xsl] XPath 3.0 question: What are function annotations?


Subject: [xsl] XPath 3.0 question: What are function annotations?
From: Dimitre Novatchev <dnovatchev@xxxxxxxxx>
Date: Sat, 1 Mar 2014 15:26:21 -0800

 In the XPath 3.0 Proposed Recommendation, section, 3.1.5.3 "Function
Coercion", http://www.w3.org/TR/xpath-30/#id-function-coercion

describes the properties of the function returned by the coercion in
the following bulleted list:

   * name: The name of F .

   * parameter names: The parameter names of F.

   * signature: Annotations is set to the annotations of F.
TypedFunctionTest is set to the expected type.

   * implementation: In effect, a FunctionBody that calls F, passing
it the parameters of this new function, in order.

   * nonlocal variable bindings: An empty mapping.


The third bullet above in particular says:

"signature: Annotations is set to the annotations of F.
TypedFunctionTest is set to the expected type"

My question is: What are function annotations and why they are nowhere
defined in the document?

Note: The XQuery function that is used as example, does not contribute
to making this section more understandable -- on the contrary. Why do
the authors assume that anyone that uses XPath should know XQuery?

-- 
Cheers,
Dimitre Novatchev
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