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[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Which is more declarative? More XMLish?
 On 12/2/2017 9:26 AM, Costello, Roger L. wrote: The only XML documents I've seen contain elements, attributes, textual data, PIs, and DTDs. They never contain books or people, or sets of them.Hi Folks, XML documents oftentimes contain a set of things – a set of books, a set of people, a set of transactions, etc. I don't mean to be all academic here, but I think it would be well to start out talking about what can really be in a document. The understanding or interpretation of that document is beyond the scope of XML per se. So a translation of what you seem to want to talk about is "elements in an XML document can be considered to represent or map to sets. Is there a good XML-ish way to represent or define how to represent and constrain a set in an XML document?" Sounds like a job for OWL... [clip ...] Recap: We’ve seen two ways to specify (constrain) a set: (a) State a property (or properties) that an object must have to qualify as a member of the set. (b) Define a set of rules which generate its members. There is a third alternative: (c) Enumerate the members of the set. TomP 
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