eXtensible Access Control Markup Language (XACML) Version 3.0¶
OASIS. (2013). eXtensible Access Control Markup Language (XACML) Version 3.0.
Cited by¶
1 citation across 1 artifact.
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Primes¶
- Identity Element
- Both values are forced by the algebra and they are opposites, so selecting the combining algorithm silently selects fail-open or fail-closed behaviour — two decisions usually made by different people months apart — unless the design enlarges the value set so the empty case has a unit of its own, as XACML does by returning NotApplicable when no rule applies, which relocates the fail-open/fail-closed choice to the enforcement point rather than removing it.
This sourceDefines the deny-overrides and permit-overrides rule-combining algorithms with opposite polarities, and returns NotApplicable - a third value rather than either algebraic unit - when no rule is applicable.
Supported in partVerified against the work's full text
XACML defines opposite-polarity combining algorithms and a separate NotApplicable result, and says treating NotApplicable as Permit versus Deny is left to the PEP; the algebraic argument is not in it.
“Note, however, that according to Section 7.2, a PEP must deny access unless it receives an explicit”
- Both values are forced by the algebra and they are opposites, so selecting the combining algorithm silently selects fail-open or fail-closed behaviour — two decisions usually made by different people months apart — unless the design enlarges the value set so the empty case has a unit of its own, as XACML does by returning NotApplicable when no rule applies, which relocates the fail-open/fail-closed choice to the enforcement point rather than removing it.
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Registry ID ref:a4778ceb8335 · see in the full table