XML

  1. XML Validation and Document Quality
    1. Well-formed XML Documents
      1. Well-formedness Definition
        1. Syntax Requirements
          1. Common Well-formedness Errors
            1. Unclosed Tags
              1. Improper Nesting
                1. Invalid Characters
                  1. Missing Root Element
                  2. Checking Well-formedness
                  3. Valid XML Documents
                    1. Validity Definition
                      1. Validation Against Schemas
                        1. Validation Process
                          1. Error Types and Handling
                          2. Validation Methods
                            1. DTD Validation
                              1. XML Schema Validation
                                1. RELAX NG Validation
                                  1. Schematron Validation
                                  2. Validation Tools
                                    1. Parser-based Validation
                                      1. Online Validators
                                        1. Command-line Tools
                                          1. IDE Integration

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                                        2. XML Syntax and Document Structure

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                                        4. XML Namespaces