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Subject: v2 XDI universal schema proposal documents
XDI TC Members and Observers, Happy Holidays! Your early Christmas present is six fresh new documents detailing the v2 XDI universal schema proposal, uploaded in preparation for this week's TC call (our final call of the year.) This email summarizes and provides links to these documents for easy reference. 1) V2 XDI UNIVERSAL SCHEMA PROPOSAL The term "universal" has evolved for the third XDI markup model (after "Inline" for the first model and "Enveloped" for the second) because after reviewing the two XDI schema proposals from the last call, it became apparent that they could easily be combined into a single schema. This had several clear advantages: * It requires only one XDI schema namespace. * It eliminates any potential confusion about overlapping elements if there was more than one XDI schema. * XDI documents that use the Universal markup model can easily incorporate XDI documents that use the Inline or Enveloped models. * It lends itself to a clean set of XDI Addressing rules that accommodate all three markup models. Besides folding in the Enveloped schema as proposed by Dave McAlpin almost verbatim, the v2 proposal incorporates other feedback from the v1 proposal, including revised semantics for referencing and a Backlinks collection element. The XSD file is posted at: <http://www.oasis-open.org/committees/download.php/10754/draft-xdi-universal -schema-v2.xsd> 2) ENVELOPED MODEL EXAMPLE The same example of the Enveloped model posted in email by Dave (and subsequently as a validated XML document by Fen) has been converted here (with very few changes) to be conformant with the v2 universal schema proposal: <http://www.oasis-open.org/committees/download.php/10755/uni-schema-v2-examp les-enveloped-model-v1.xml> 3) UNIVERSAL MODEL EXAMPLE - SHORT FORM BUSINESS CARD The v1 short form business card example has been updated to conform to the v2 schema: <http://www.oasis-open.org/committees/download.php/10756/uni-schema-v2-examp les-bizcard-short-v1.xml> 4) UNIVERSAL MODEL EXAMPLE - LONG FORM BUSINESS CARD The v1 long form business card example (where all the references have been expanded to be included in the same XDI document) has also been updated to conform to the v2 schema: <http://www.oasis-open.org/committees/download.php/10757/uni-schema-v2-examp les-bizcard-long-v1.xml> 5) V2a UNIVERSAL SCHEMA MODEL SEMANTICS This MS Word document has been updated to summarize the semantics of the new/revised elements in the v2 universal schema. In addition it also includes a new graphic at the end showing a visual representation of the different elements of the XDI graph (very helpful when reading the XDI Addressing Rules, below.) Note that v2a includes some corrections of missing elements in v2, so you can ignore v2. <http://www.oasis-open.org/committees/download.php/10761/universal-schema-mo del-semantics-v2a.doc> 6) V2 UNIVERSAL SCHEMA ADDRESSING RULES Finally, the XDI Addressing document that accompanied earlier XDI schema proposals has been completely updated to provide the addressing rules for XRI addressing of all XDI Resources regardless of markup model. Note that it does NOT yet provide addressing rules for the XMLRef, XMLTransforms, or XMLTransform elements, which should follow the precedent in XML-Dsig. <http://www.oasis-open.org/committees/download.php/10760/universal-schema-ad dressing-rules-v1.doc> =Drummond
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