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Subject: Input needed on UBL SBS and UBL business rules
Hello UBL PSC and TSC, At its meeting in Manhattan last month, the UBL TC assigned the following action items: ACTION: PSC and TSC to provide feedback on UBL 2.0 SBS 2.0: http://www.oasis-open.org/committees/download.php/23873 ACTION: PSC and TSC to summarize business rules that are (1) wanted in UBL but not allowed by [i.e., capable of being addressed by] the NDR (e.g., requirement to include one of PartyName and PartyIdentifier but not both) and (2) data items whose constraints are inherited from another standard (e.g., lengths of data items specified by UNTDED); the rules so identified to become candidates for a list of schematron assertions "recommended to be included" (final characterization TBD). The first item is self-explanatory, but the second deserves a word of explanation. The impetus for this came from a request that we use the second (XSLT) validation phase of UBL 2.0 to add certain essential basic rule-checking functions to the code value checking already provided in the release. As we intend to issue periodic updates to the code lists and the default .xsl file, this will be straightforward logistically, but we need your input on what kinds of rules to include. We think that the most useful rules will be those that implement co-occurrence constraints necessary for correct use of the UBL schemas but impossible to implement using XSD. A clear example is the requirement to include one of PartyName and PartyIdentifier but not both, which is impossible to express in XSD but very easy to express in Schematron and then embody in the default .xsl script. What we need from you are examples of other such rules essential to proper UBL processing. We're also looking for rules that are (or should be) inherited from other standards, the example here being the lengths for data items specified by the UNTDED. It would be good to have this input in time for consideration at the UBL TC meeting in September. Please let me know if you see any problem with these requests. Best regards, Jon
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