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Subject: Re: [ubl-dev] infinite loop
It seems reasonable to conclude that the standard part of UBL is loose enough to allow most kinds of use. To actually use it you probably need more than just the standard. You need to further restrict it e.g. to restrict the number of nestings of AgentParty. There are standard ways to do this. Ken and I first produced a subset by listing elements using XPaths. David led a standard for restricting documents, also involving XPath and called CAM. I edited an in progress potential standard which can also be used with XPath to define restrictions and that is called test assertion markup language. Ken led some of the work to standardise a more prevalent , similar technology to add restrictions beyond the schema called Schematron when it was standardised in ISO. All these help restrict UBL with rules or assertions beyond what the standard requires but to meet typical requirements for implementing it. Worth looking into all this, I expect. Regards Stephen D Green -- Best regards Steve --- Stephen D Green
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