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Subject: [xacml] SH02: Use of decimal math should be justified
It is unusual to specify the use of decimal math in a specification like XACML, especially requiring strict conformance to a detailed specification of decimal math behavior. Many platforms do not support decimal math. Binary math is much more common. I can see why you might want to use decimal math for this specification. Maybe you're likely to be doing a lot of financial calculations. Still, I think it's a bit odd that you require support for exponents, NaNs, and the like in the implementation but don't provide any way for a user to access these features. A simpler approach would have been to leave the arithmetic loosely specified, like XQuery has done. At the least, I think you should add a few sentences to the end of section A.12 Arithmetic evaluation saying Decimal arithmetic is used in order to provide results that closely match those expected by the average user. Thanks, Steve Hanna Sun Microsystems, Inc.
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