XMLReader can handle very large files better than Dom Document.This tells XMLBlueprint to validate the XML Document against XML Schema "book.xsd".To be notified of validation errors in an XML document, the following must be true: It is helpful to start by defining the constants you will use when configuring the factory.
The above piece of code is actually easy to understand, the most important method here is the validate Feeds() method.
The upside of using XMLReader over Dom Document is scalability.
The function ensures that your document is compliant with the rules defined by an associated DTD, XML Schema, Relax NG, or Schematron schema.
XML Schema or Relax NG schema also allows you to embed Schematron rules.
Using the Xml Document class, you can validate the XML content contained in an Xml Document object in two ways. If a Validation Event Handler is set on the validating Xml Reader, the Validation Event Handler will get called whenever an invalid type is encountered. Message) Exit Sub End Select End Sub End Class After modifications are made to an XML document, you can validate the modifications against the schema for the XML document using the Validate method of the Xml Document class. XPath Class Validating Reader Example Shared Sub Main(By Val args() As String) Try Dim settings As Xml Reader Settings = New Xml Reader Settings() settings.
The first way is to validate the XML content using a validating Xml Reader object and the second way is to use the Validate method of the Xml Document class. An Xml Schema Exception will be thrown when an attribute or element with Typed Value set to is accessed by the XPath Navigator. The following example validates the file as it is loaded into the Xml Document object by creating the Xml Document object using a validating Xml Reader object.
Now that the program is ready to validate with an XML Schema definition, it is necessary only to ensure that the XML document is associated with (at least) one.
There are two ways to do that: , which stands for "XML Schema instance." The second line specifies the schema to use for elements in the document that do not have a namespace prefix-that is, for the elements you typically define in any simple, uncomplicated XML document.
You also set a factory attribute to specify the parser language to use.
(For SAX parsing, on the other hand, you set a property on the parser generated by the factory).
Now, we are ready to validate our XML file against the XSD using either DOMDocument or XMLReader.