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Set operations in XACML

From: Daniel Engovatov <[email protected]>
To: [email protected]
Date: Thu, 01 Sep 2005 21:45:00 -0000

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Subject: Set operations in XACML




From: "Daniel Engovatov" <[email protected]>
To: "Bill Parducci" <[email protected]>,  "xacml" <[email protected]>
Date: Thu, 1 Sep 2005 14:45:00 -0700








Minor proposal:

It seems that provided set operations in the specifications are
incomplete, as they do not provide a way to do difference of sets.

I suggest that we add "type-except" (or type-difference, I slightly
prefer except for being used in some other places) with a description:

"This function SHALL take two arguments that are both a bag of type
values. The expression SHALL return a bag of type such that it contains
all elements that are in the first argument that are not in the second
argument. No duplicates as determined by
"urn:oasis:names:tc:xacml:1.0:function:type-equal" SHALL exist in the
result."

A use case would be to remove a particular value(s) from a bag/set.

Daniel;















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