Validating an xml schema
The Xml Document class validates the XML data as it is loaded into the DOM when a validating Xml Reader is passed to the Load method of the Xml Document class. Create("contoso Books.xml", settings) ' The Xml Document validates the XML document contained ' in the Xml Reader as it is loaded into the DOM.
After successful validation, schema defaults are applied, text values are converted to atomic values as necessary, and type information is associated with validated information items. Dim document As Xml Document = New Xml Document() document.
Finally, one of the errors is corrected, and then part of the XML document is partially validated.
The last book ' element is invalid, but not included in validation. Select Single Node("/bk:bookstore/bk:book", manager) document. Validate(Address Of Validation Event Handler, book Node) Catch ex As Xml Exception Console.
This tutorial explains the procedure for performing that validation using parsers for the Simple API for XML (SAX) and Document Object Model (DOM), as well as an XML Schema Design (XSD) validator.
This also enables correct handling of include files from within the Relax NG parser.Apart from the built-in DTD support in parsers, lxml currently supports three schema languages: DTD, Relax NG and XML Schema.All three provide identical APIs in lxml, represented by validator classes with the obvious names.In our case, we'll use the example of an XML document, Xml Document Url, that contains an As I explained previously, an XML Schemain our example, Schema Urldefines the structure of an XML document.The element declarations in an XML Schema can specify the namespace/s of the elements in the XML document.
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Through its support for datatypes and namespaces, XML Schema has the potential to provide the standard structure for XML elements and attributes.