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Multimedia Presentation

By far the largest amount of Web content is HTML, but other data types are also in widespread use. A hypertext link in HTML can be linked to an arbitrary data type. When the Web server returns a page, an HTTP header carries data type information to the browser. Browsers have built-in support for many data types, can accept plug-in extensions to handle other data types, and can launch a completely different application for still others.

  • Built-in

    Popular browsers implement native support for HTML and image formats such as GIF, JPEG, and PNG.

  • Plug-in

    Adobe Systems provides a freely distributed reader for Acrobat format files. When installed, the reader plugs into the browser to add support for the Acrobat data type. When the user clicks an Acrobat document, the reader plug-in takes over the browser window and displays the document in place.

  • Separate application

    A Web document catalog might contain a Microsoft PowerPoint presentation. When the user clicks on the associated link, the user's copy of PowerPoint is launched to handle the file.


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