XML documents are validated by the Create method of the Xml Reader class. Schema namespace contains extension methods that make it easy to validate an XML tree against an XSD file when using LINQ to XML.
To validate an XML document, construct an Xml Reader Settings object that contains an XML schema definition language (XSD) schema with which to validate the XML document. For more information on validating XML documents with LINQ to XML, see How to: Validate Using XSD. Validation Event Handler, New Validation Event Handler(Address Of books Settings Validation Event Handler) Dim books As Xml Reader = Xml Reader. Read() End While End Sub Shared Sub books Settings Validation Event Handler(By Val sender As Object, By Val e As Validation Event Args) If e.
It is very necessary to know about valid XML document before knowing XML validation.
For Schematron validations you can also select the validation phase.
One of the most basic XML parsing tasks in web applications is reformatting XML data for display on a web page - basically using it as a markup language.
For such chores, silently ignoring an invalid element is a minor problem.
You get a missing or garbled row of data in output that's being read by a human, who can figure out what it should say, or ignore it, or even get the data from another source if it's the bit they're looking for.
The XML file must contain in addition: (1) complex Type is a child element of element and it will define the possible "data structures" for the element.
In the example below we define five child elements for "recipe" - i.e. We also could define attributes, grand children that way.
will point to the definition of the sub-element (see further below for an example) The Russian puppet model is recommended for very simple DTDs.
SAXException; public class XMLValidation Employee validates against Employee.xsd? true Exception: cvc-elt.1: Cannot find the declaration of element ' Employee'.
The function ensures that your document is compliant with the rules defined by an associated DTD, XML Schema, Relax NG, or Schematron schema.