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Posted by / 13-Jun-2019 11:44

Validating xml net

I've found Schematron to be the most promising of these.Schematron, created by Rick Jelliffe, defines a set of rules and checks that are applied to an XML instance.Most XML technologies (RDF, XSLT, and XLink) and schema languages (RELAX, XML Schema, SOX) are represented as XML.This uniformity helps make these technologies easy to learn, and it means developers are able to leverage existing XML tools.

This is very similar to XSLT templates, which are fired with respect to a node or group of nodes returned by an XPath expression.Consider the following XML: If one constraint on such a document is that a short Story element may only contain an author attribute if it isn't the child of anthology element, it wouldn't be possible to represent that constraint in a DTD.These DTD handicaps aren't going unnoticed, and the W3C is presently developing an XML Schema language (currently a W3C Candidate Recommendation) that is more expressive and powerful than DTDs.This places DTDs at a disadvantage because developers must learn an additional syntax in order to define their XML schemas--but DTDs also have more severe restrictions.DTDs are somewhat limited in their range of expression; therefore, they cannot be used to validate some XML document structures.

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