Updated: November 2007
To define the structure of an XML document, as well as its element relationships, data types, and content constraints, you use a document type definition (DTD) or schema. Although an XML document is considered to be well formed if it meets all the syntactical requirements defined by the World Wide Web Consortium (W3C) Extensible Markup Language (XML) 1.0 Recommendation, it is not considered valid unless it is well formed and also conforms to the constraints defined by its DTD or schema. Therefore, although all valid XML documents are well formed, not all well-formed XML documents are valid.
For more information about XML, see the W3C XML 1.0 Recommendation. For more information about XML Schema, see the W3C XML Schema Part 1: Structures Recommendation and the W3C XML Schema Part 2: Datatypes Recommendation.
The XmlReader class can enforce validation using a DTD or Schema definition language (XSD) schema. The ValidationType property on the XmlReaderSettings class determine whether the XmlReader instance enforces validation.
In This Section
- Validation Options on XmlReaderSettings Class
Describes the specific validation settings.
- Validation Using the XmlSchemaSet
Describes how to validate using schemas stored in the XmlSchemaSet.
- Validation Using an Inline XML Schema with XmlReader
Describes how to validate using an inline schema.
- Validation Using a DTD with XmlReader
Describes how to validate using a DTD.
- Validation Using a Wrapped XmlReader Object.
Describes how to validate DOM objects by wrapping an XmlNodeReader object.
Related Sections
- Data Conformance Checking with XmlReader
Describes data conformance checks that can be set on the XmlReader class.
- Validation of XML with XmlValidatingReader
Describes how to validate using the XmlValidatingReader class.
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This should only be used if you require XDR support, or if you need to use the 1.0/1.1 implementation.
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