W3C Activities

1
W3C Activities

• HTML is the lingua franca for publishing on the
  Web
• XHTML an XML application with a clean migration
  path from HTML 4.01
• CSS Style sheets describe how documents are
  displayed
• XSL consists of three parts XSLT, XPath, and XSL
  Formatting Objects.
• DOM Document Object Model is a platform and
  language neutral API to access and update the
  content, structure, and style of a document
• SOAP Simple Object Access Protocol communication
  protocol to allows programs to communicate via
  standard Internet HTTP
• WAI the Web Accessibility Initiative for people
  with disabilities

2
Application Program Interfaces

• There are two standard application program
  interfaces to XML data
• SAX (Simple API for XML)
• Based on parser model, user provides event
  handlers for parsing events
• E.g. start of element, end of element
• Not suitable for database applications
• Interesting format for data streams
• DOM (Document Object Model)
• XML data is parsed into a tree representation
• Variety of functions provided for traversing the
  DOM tree
• E.g. Java DOM API provides Node class with
  methods getParentNode( ),
  getFirstChild( ), getNextSibling( )
  getAttribute( ), getData( ) (for text node)
  getElementsByTagName( ),
• Also provides functions for updating DOM tree

3
W3C Activities--cont

• WAI the Web Accessibility Initiative for people
  with disabilities
• MathML Mathematical Markup Language
• SMIL Synchronized Multimedia Integration
  Language to enable multimedia presentations on
  the Web
• RDF the Resource Description Framework
  describing metadata about Web resource---semantic
  web.
• GML GIS in XML
• SVG Scalable Vector Graphics language for
  describing 2D graphics in XML