Validating xml data

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.

Because the XML document is valid according to its schema, no schema validation errors or warnings are generated.

The Xml Document class does not validate an XML document using either DTD or XML schema definition language (XSD) schema validation by default. Note When an XML document is loaded into an Xml Document object with an associated schema that defines default values, the Xml Document object treats these defaults as if they appeared in the XML document. The example then makes two modifications to the XML document that are invalid according to the schema.

It only verifies that the XML document is well formed. Message) End Try End Sub Shared Sub Schema Validation Handler(By Val sender As Object, By Val e As Validation Event Args) Select Case e. This means that the Is Empty Element property always returns The Validate method of the Xml Document class validates the XML document contained in an Xml Document object against the schemas specified in the Xml Document object's Schemas property and performs infoset augmentation. XPath Class Validate Example Shared Sub Main(By Val args() As String) Dim document As Xml Document = New Xml Document() document. Add(" "contoso Books.xsd") Dim validation As Validation Event Handler = New Validation Event Handler(Address Of Schema Validation Handler) document. The first modification inserts an invalid child element resulting in a schema validation error, and the second modification sets the value of a typed node to a value that is invalid according to the type of the node resulting in an exception.

As the XML document was loaded, any schema validation errors encountered would have been handled by the validation event handler method and written to the console.

Message) Exit Sub End Select End Sub End Class In the example above, two modifications are made to the XML document contained in the Xml Document object.

To add format to the XML documents you can use Extensible Stylesheet Language (XSL). It can map XML elements into other formatting or mark-up languages such as HTML.

In Oracle XML DB, BEGIN -- Delete the schema, if it already exists; otherwise, this produces an error.

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In this example, the validation errors were introduced after the XML document was loaded and were found using the Validate method of the Xml Document class. When you sign in to comment, IBM will provide your email, first name and last name to DISQUS.

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