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But there will be times when you want to create a schema to match an existing object.In this section, you'll learn about the methods that are available to programmatically generate XSD schemas.Create() with proper XMLReader Settings for validating the document. Following graphic(click for larger image) shows the XML file that we are using: To validate the XML shown above, we have the schema. Please note that in absence of event mentioned in point (3), an exception will be thrown on the first error encountered in XML file where as in case of having the Validation Event Handler hooked up, all the errors in the XML file can be displayed.Following code shows the steps mentioned above: Validating XML using Xml Reader Settings follows almost the same path as that for Xml Validating Reader, with a difference that here we will be using Xml Reader Settings to pass in the schema details.NET user interface by dragging and dropping XML elements from the toolbox.This method is useful when you need to create a schema from scratch.Using the Xml Validating Reader tells about the element/attribute with incorrect value as per the data type, but using Xml Reader Setting provides a detailed error showing the incorrect value along with the expected datatype.I hope I was able to provide most of you with a good insight on validating XML files using schemas.
Any valid XML file is well-formed, but not every well-formed XML file is valid.DTDs are part of the Standardized Generalized Markup Language (SGML) standard, from which both HTML and XML derive.The NOTE XDR Validation The Xml Validating Reader can also validate an XML file for conformance with an XML Data Reduced (XDR) specification.Although any XML file that conforms to the syntactical rules for XML is well-formed, this does not automatically make the file valid.A valid XML file is one whose structure conforms to a specification.