OASIS eXtensible Access Control Markup Language (XACML) TC

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[xacml] AA11: Clarify "MatchId" functions

  • 1.  [xacml] AA11: Clarify "MatchId" functions

    Posted 10-14-2002 13:50
    Text location: Section A.11 Matching elements, p. 89, lines 3446-3456. Text change: Replace follow paragraph: "The match elements: <SubjectMatch>, <ResourceMatch> and <ActionMatch> SHALL use XACML standard functions to perform the match evaluation. The function used for determinaing a match is named in the MatchId attribute of these elements. Each of these elements contains a <AttributeDesignator> or <AttributeSelector> element and an explicit attribute value. The restriction on the function is that the MatchId attribute must name a binary function, such that its result type is "xs:boolean". Also, each argument to the named function must match the appropriate primitive types for the <AttributeDesignator> or <AttributeSelector> element and the following explicit attribute value, such that the explicit attribute value is placed as the first argument to the function, while an element of the bag returned by the <AttributeDesignator> or <AttributeSelector> element is placed as the second argument to the function." with the following: "The match elements: <SubjectMatch>, <ResourceMatch> and <ActionMatch> SHALL use functions that match two arguments, returning a result type of "xs:boolean", to perform the match evaluation.The function used for determinaing a match is named in the MatchId attribute of these elements. Each argument to the named function must match the appropriate primitive types for the <AttributeDesignator> or <AttributeSelector> element and the following explicit attribute value, such that the explicit attribute value is placed as the first argument to the function, while an element of the bag returned by the <AttributeDesignator> or <AttributeSelector> element is placed as the second argument to the function. The XACML standard functions that may be used as a MatchId attribute value are: function:*-equal function:*-greater-than function:*-greater-than-or-equal function:*-less-than function:*-less-than-or-equal function:*-match [function:*-one-and-only]??? [function:*-is-in]??? Rationale: explanation of which functions may be used as MatchId functions is not clear. Also, function used need not be a "standard" function as long as it returns a boolean and its arguments follow the required format. Anne -- Anne H. Anderson Email: Anne.Anderson@Sun.COM Sun Microsystems Laboratories 1 Network Drive,UBUR02-311 Tel: 781/442-0928 Burlington, MA 01803-0902 USA Fax: 781/442-1692