Current Solutions

• Data Modeling Language -- XML
  • Extensible like SGML
  • Lightweight over-the-wire like HTML
  • Rigorously parsable (or not), and definably so by specification.
    
    
• XML provides a rigorous framework for specifying all sorts of structured data. Some current defined (or works in progress) XML dialects are:
  • MathML (for mathematics)
  • SVG - Scalable Vector Graphics
  • Namespaces - For specifying XML namespaces
  • SMIL - Synchronized Multimedia Integration Language
    
    
  • RDF - Resource Description Framework (metadata)
  • XSL - eXtensible Stylesheet Language (metadata)
  • X?? - Schema definition Lanaguage

There is work underway to re-specify HTML as a dialect of XML