[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] RE: Is Schematron (using XPath 2.0) functionally a superset of
> > Is Schematron (using XPath 2.0) functionally a superset of > XML Schemas? Remember that XML Schema does more than validation. Even if you're only interested in validation, then I think there are some rules that can be expressed in a grammar that are very hard to express in predicate calculus. Even simple rules like a content model of (name, address-line+, postcode) are very clumsy to express as XPath assertions, though it can be done. I don't know the answer to the theoretical question of whether all grammar rules can be translated into predicates, but I know that the answer to the practical question is that I wouldn't want to. Michael Kay http://www.saxonica.com/ > > Using XPath 2.0, Schematron can now perform all of the > grammar-type checks that XML Schemas does, e.g. check that > the correct tags are being used, the tags are arranged > properly, and the datatypes of each element and attribute are > correct. > > Plus Schematron can perform co-constraint checks, cardinality > checks, and algorithmic checks that XML Schemas cannot do. > > Are there things that XML Schemas can do that Schematron (using Xpath > 2.0) cannot do? > > /Roger > > ______________________________________________________________ > _________ > > XML-DEV is a publicly archived, unmoderated list hosted by > OASIS to support XML implementation and development. To > minimize spam in the archives, you must subscribe before posting. > > [Un]Subscribe/change address: http://www.oasis-open.org/mlmanage/ > Or unsubscribe: xml-dev-unsubscribe@l... > subscribe: xml-dev-subscribe@l... List archive: > http://lists.xml.org/archives/xml-dev/ > List Guidelines: http://www.oasis-open.org/maillists/guidelines.php >
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