C validating xmlreader


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The Xml Document class does not validate the XML in the Document Object Model (DOM) against an XML Schema definition language (XSD) schema or document type definition (DTD) by default; the XML is only verified to be well-formed.

To validate the XML in the DOM, you can validate the XML as it is loaded into the DOM by passing a schema-validating Xml Reader to the Load method of the Xml Document class, or validate a previously unvalidated XML document in the DOM using the Validate method of the Xml Document class.

In the code example that follows, a schema-validating Xml Reader validates the XML data loaded into the DOM. Schema Class Xml Document Validation Example Shared Sub Main() Try ' Create a schema validating Xml Reader. Validation Event Handler, New Validation Event Handler(Address Of Validation Event Handler) settings. Select Single Node("/bk:bookstore/bk:book/bk:price", manager) Console.

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.

Document type definition (DTD) validation is implemented using the validity constraints defined in the World Wide Web Consortium (W3C) Extensible Markup Language (XML) 1.0 Recommendation.

DTDs use a formal grammar to describe the structure and syntax of compliant XML documents; they specify content and values allowed for the XML document.

Inner Xml = "A" Dim price Nodes As Xml Node List = document. Xml Document Xml Reader Validation Event Handler Xml Reader Settings Process XML Data Using the DOM Model Working with XML Schemas Note The feedback system for this content will be changing soon. If content within a comment thread is important to you, please save a copy.

For examples illustrating the Validation Event Handler, see "Validating an XML Document As It Is Loaded into the DOM" and "Validating an XML Document in the DOM" above.

As a result, typed XML data replaces previously untyped XML data.

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