Validating XML Documents Against a Schema

A Valid XML document is a Well-Formed XML document that also conforms to the rules of a schema that defines the legal elements of an XML document. The schema type can be: XML Schema, Relax NG (full or compact syntax), Schematron, Document Type Definition (DTD), or Namespace-based Validation Dispatching Language (NVDL).

The purpose of the schema is to define the legal building blocks of an XML document. It defines the document structure with a list of legal elements.

The Validate 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 can embed Schematron rules. For Schematron validations you can select the validation phase.

1. Presenting Validation Errors in Text Mode
   
2. Presenting Validation Errors in Author Mode
   
3. Customizing Assert Error Messages
   
4. Validation Example - A DocBook Validation Error
   
5. Automatic Validation
   
6. Custom Validators
   
7. Validation Scenario
   
8. Sharing Validation Scenarios
   
9. Validation Actions in the User Interface
   
10. References to XML Schema Specification
    
11. Resolving References to Remote Schemas with an XML Catalog