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Wireless Application Protocol

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Wireless Application Protocol

Wireless Application Protocol

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Transcript

  • 1. Wireless Application Protocol Presented by Altech Lanka (Pvt) Ltd.
  • 2. WAP overview
    • Objective of WAP is to provide internet services to handheld wireless devices.
    • Handheld devices tend to have,
      • Less memory.
      • Less powerful CPUs.
      • Different input devices.
      • Smaller displays.
  • 3. WAP overview
    • WAP designed to take advantage of the several data-handling approaches already in use.
    • WAP integrates the Handheld Device Markup Language (HDML) and Handheld Device Transport Protocol (HDTP).
  • 4. WAP network
  • 5. WAP network
    • Mobile device communicates with the WAP gateway in the wireless network.
    • The WAP gateway translates WAP request to WWW request, so the WAP client is able to submit the request to the Web server.
    • Also WAP gateway translates Web responses into WAP responses or a format understood by the WAP client.
  • 6. WAP Programming Model
  • 7. WML
    • WML (WireLess Markup Language) is an XML-based markup language that was designed to describe how WAP contents is presented on a wireless terminal.
  • 8. WML Vs HTML
    • WML was specifically designed for wireless terminals with a target screen that is only a few lines long and about an inch wide.
    • WML is case sensitive, and all tags and attributes should be in lowercase.
    • Unlike HTML, WML is unforgiving of incorrectly nested tags.
    • WML doesn't assume that a keyboard or a mouse is available for user input.
  • 9. WML Basics
    • The basic unit of WML is the card that specifies a single interaction between the user and the user agent.
    • Multiple cards are grouped together in decks.
    • A deck is the topmost element of a WML document.
    • When the user agent receives a deck (by downloading the complete deck), it activates only the first card in the deck.
  • 10. Common MIME Types for WAP
    • text/vnd.wap.wml for .wml files (WML source files)
    • application/vnd.wap.wmlc for .wmlc files (WML compiled files)
    • text/vnd.wap.wmlscript for .wmls files (WMLScript source files)
    • application/vnd.wap.wmlscriptc for .wmlsc files (WMLScript compiled files)
    • image/vnd.wap.wbmp for .wbmp files (wireless bitmaps)