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Subject: Behavior of the to-lower-case function

Hi all,


We from HERAS-AF implemented an XACML 2.0 evaluation engine.

Therefore we had to implement the function

  • urn:oasis:names:tc:xacml:1.0:function:string-normalize-to-lower-case

The issue I am currently facing with this function is that it does a “to lower case”.


In XACML 2.0 it simply says “This function SHALL take one argument of data-type ‘http://www.w3.org/2001/XMLSchema#string’ and SHALL normalize the value by converting each upper case character to its lower case equivalent.”. No word about locales. But to-lower-case always depends on the locale.


In XACML 3.0 it says “Case mapping shall be done as specified for the fn:lower-case function in [XF] with no tailoring for particular languages or environments.”. I am not an expert in this area and don’t really understand what is meant with “no tailoring for particular languages and environments”.


So my questions:

·         Should the handling in XACML 2.0 be the same as in XACML 3.0?

·         How is this meant “no tailoring for particular languages and environments”?



I am looking forward to hearing from you.




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