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Subject: X.500/LDAP attributes and XED
As mentioned on last week's call, there is a large body of recent work involving application of XML technology to X.500/LDAP-based directories. The work overall is called "XML-Enabled Directory", XED, and is described in a series of internet-drafts: draft-legg-xed-roadmap-01.txt* draft-legg-xed-dxer-00.txt* draft-legg-xed-glue-00.txt* draft-legg-xed-schema-00.txt* draft-legg-xed-asd-00.txt* draft-legg-xed-protocols-01.txt In particular the dxer doc, whose abstract is: This document defines a set of Abstract Syntax Notation One (ASN.1) encoding rules, called the Directory XML Encoding Rules or DXER, that produce an Extensible Markup Language (XML) representation for values of any given ASN.1 data type. has some proposals that are likely to be relevant to my (and presumably the TC's) interest in re-using X.500/LDAP attribute definitions in SAML attribute assertions. I haven't had a chance to review this in enough detail to make an assessment about this, however. I should note that this work is not any sort of standard or even an accepted work item of an IETF WG. There is related work going on in the ITU as well, and suggestions that this work be conducted there. So incorporation of material from these docs, if appropriate, would be by value, not by reference. I think the DXER part of the XED proposal is consistent with the requirements I expressed in my proposal to the TC about X.500/LDAP, though obviously it is more ambitious. Let me suggest that it would be appropriate to draw from this material (with approval of the authors, with whom I have discussed this briefly) when working on a solution proposal for this issue. - RL "Bob"
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