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Subject: [xacml] Draft resolution for errata 3.17: unclear conversion from XPath tobag
This is the draft resolution for errata 3.17: Unclear how to convert nodes from XPath expression into bag of attributes. The following resolution explicitly states that we deals with only simpler cases such as a text node and an attribute value which are obvious how to convert those values to literals. It does not deal with a node or a set of nodes which is much harder to handle. Lines 2409--2413 should be replaced with the following: Each selected node by the specified XPath expression MUST be either a text node, an attribute node, a processing instruction node, or a comment node. The string representation of the value of each selected node MUST be converted to an attribute value of the specified data type, and the result of the AttributeSelector is the bag of the attribute values generated from all the selected nodes. If the selected node is different from the node types listed above, then the result of that policy SHALL be "Indeterminate" with a StatusCode value of "urn:oasis:names:tc:xacml:1.0:status:syntax-error". Michiharu Anne Anderson <Anne.Anderson@Su To: XACML TC <xacml@lists.oasis-open.org> n.com> cc: Subject: [xacml] Minutes of 5 June 2003 Focus Group meeting 2003/06/06 05:21 Please respond to Anne.Anderson Minutes of OASIS XACML Focus Group 05 June 2003 Present: Anne Anderson (scribe), Ed Coyne (SAIC, prospective), Michiharu Kudo, Simon Godik, Carlisle Adams, Steve Crocker Agenda ====== Review Errata 1. Work Item G: Environment in Target [Lower priority for today than Errata. We returned to this after discussing Errata.] Michiharu asked about why this was dropped from the 1.1 Work Item list at the last meeting. Michiharu disagrees with dropping this, but he is not clear on when something is not appropriate for 1.1 (Hal's comment about why this item should be dropped from the 1.1 Work Items). RECOMMENDATION: All requirements for including this in 1.1 have been met with the exception of agreeing on a solution by the end of June 2003. Michiharu has followed the agreed upon process of submitting a proposal by a certain date, a detailed solution by a certain date, etc. Simon has an alternative proposal/solution for this that he will submit to the e-mail list for discussion. 2. Simon still having problems downloading the specification. Michiharu has checked with OASIS webmaster, who is aware of the problem since webmaster has same problem. Michiharu will put a note on the XACML TC web site saying there may be a problem with some browsers. 3. Errata review Simon published draft-xacml-errata-02.doc attached to http://lists.oasis-open.org/archives/xacml/200306/msg00001.html - 3.12 <Status> element MAY: include action and environment attributes. RECOMMENDATION: Approve - 3.13 <Status> element MUST NOT list action or environment attributes. RECOMMENDATION: Approve - 3.14 <AttributeValue> occurrence is inconsistent. RECOMMENDATION: Approve. Also remove minOccurs="0" from line 2644 in spec to agree with schema. - 3.15 Semantics of the <<AttributeDesignator> with MustBePresent attribute set to "true" is unclear when <Attribute> does not contain <AttributeValue> **RECOMMENDATION: Needs more thought. Might approve, except change text to say "result is not an empty bag, but one empty element that is added to the resulting bag." But in the case of an empty <AttributeValue DataType="...#integer">, then the <AttributeValue> is schema-invalid. - 3.16 MustBePresent attribute semantics for the <AttributeSelector> element. RECOMMENDATION: Approve. Use status of "processing-error", not "missing-attribute" in the place where a question mark occurs. - 3.17 Unclear how to convert nodes from XPath expression into bag of attributes. **RECOMMENDATION: TBD. [XF] defines how to convert nodes into LITERAL, but the processing is very complex. Michiharu will investigate a solution. Other items in the errata list have probably already been disposed, but Simon has not yet found the relevant e-mails. - 3.7 Obligations for the policy. **RECOMMENDATION: Anne to look for e-mails where Polar? clarified to Satoshi that 7.11 refers to both <Policy> and <PolicySet> and then Satoshi said 7.11 was clear with that clarification, and so Erratum 3.7 could be dropped. - 3.9 <XPathVersion> element **RECOMMENDATION: Simon will look for discussion of this on the list. No one can remember what the disposition was. - Several new errata reported to Michiharu by Jim Fuller, but not put on xacml-comment. Michiharu will forward to xacml-comment. -- 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 You may leave a Technical Committee at any time by visiting http://www.oasis-open.org/apps/org/workgroup/xacml/members/leave_workgroup.php
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