[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: datatype functionality I'd like to see
Quoting Burak Emir <Burak.Emir@e...>: > > > > > I certainly do not know any schema language that deals with "segmented" > regular expressions. > > However, in research languages, regular pattern matching is getting > quite popular. In Scala for instance, your SSN could be decomposed like > this > > def decomp(ssn:Seq[Char]):Pair[Seq[Char],Seq[Char]] = ssn match { > case (part1 @ DD-AA)(part2 @ BDD-DDDD) => Pair(part1, part2) > case _ => error("invalid ssn") > } > Thanks for your reply, that scala looks pretty interesting. Maybe I should look at that language again (checked it out once when it was on lambda) > I once had the idea of adding this feature of pattern matching to a (yet > another) type system for objects and XML(turning sequences of nodes in > something like a record). Glad there seems to be use for it. Yeah, after posting I got the idea to implement it as an extension to schematron, processor specific, using the skeleton1-5.xsl basically one would have some data types declared at the top of the schematron schema: <sch:dtypes> <sch:type name="Date" using="jscript:Date"/> <sch:type name="USDate" using="dtype:Date"> <test>....</test> </sch:type> </sch:dtypes> and then under specific rules: <sch:isDtype type="USDate"/> obviously I haven't got to the dtype: functionality yet (not exactly sure how I want the syntax to work anyway), but checking against anything that inherits from jscript: just means calling a function that returns a boolean dependent on how some typechecking and or loading into a new instance of the object works out. Gets me wondering also if Dmitri Novatchev's fxsl might not be put to good work to extend schematron with data typing.
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