HOW TO RELAX

Table of contents

• Part 1: RELAX Core
  • STEP 0: Introduction
    • RELAX, brief overview
      • Comparison with DTD
      • The RELAX processor
      • The organization of RELAX
      • About this tutorial
    • Summary
  • STEP 1: Migration from XML DTD (without parameter entities)
    • An example module
    • The module element
    • The interface element
      • The export element
    • Element type declarations
      • Element hedge model
        • The empty element
        • The ref element
        • The choice element
        • The sequence element
        • The none element
      • Datatype reference
      • Mixed hedge model
    • Attribute-list declarations
    • Summary
  • STEP 2: Migration from XML DTD (with parameter entities)
    • Parameter entities used in content models
      • Overview
      • Permissible hedge models
      • The occurs attribute
      • Occurrence order of hedgeRef and hedgeRule
      • Illegal reference to itself
      • Use of empty
      • Use of none
    • Parameter entities used in attribute-list declarations
      • Overview
      • Occurrence order of ref and attPool
      • Multiple ref elements
      • Illegal reference to itself
    • Summary
  • STEP 3: Datatypes
    • Datatypes of XML Schema Part 2
    • Datatypes unique to RELAX
      • none
      • emptyString
    • Additional constraints
      • elementRule
      • attribute
    • Summary
  • STEP 4: Annotation
    • The annotation element
      • The documentation element
      • The appinfo element
    • The div element
    • Summary
  • STEP 5: Dividing large modules
    • Why divide modules?
    • The include element
    • Non-empty interface elements
    • Summary
  • STEP 6: Default values, entities, and notations
    • Reasons that RELAX does not handle them
    • Using DTD and RELAX together
    • Better leave them out
    • Summary
  • STEP 7: elementRule and hedgeRule, revisited
    • elementRule and labels
      • Context-sensitive content models
      • The label attribute of elementRule elements
      • The label attribute of ref elements
    • Sharing labels
      • Multiple hedgeRule elements sharing the same label
      • Prohibition of label sharing by hedgeRule and elementRule
      • Multiple elementRule elements sharing the same label
    • Summary
  • STEP 8: tag and attPool, revisited
    • The role attribute of tag elements
      • Switching content models depending on attribute values
      • Constraints represented by tag elements
      • The role attribute of elementRule elements
      • Prohibition of references by ref elements
      • The none datatype, revisited
    • attPool elements
      • Constraints represented by attPool
      • Prohibition of references by elementRule elements
    • Prohibition of role sharing by multiple tag or attPool elements
    • Summary
  • STEP 9: Hedge content model element
    • Simulating programming languages and database languages
    • The element element
    • Expansion to ref, elementRule, and tag elements
    • Expansion procedure
      • Generating ref elements
      • Generating elementRule elements
      • Generating tag elements
    • Summary
  • STEP 10: tag embedded in elementRule
    • Describing attributes and hedge models together
    • Handling of embedded tag elements
    • Summary