Channel Definition Format: Information from Answers.com

For other uses of "CDF", see CDF (disambiguation).

Channel Definition Format (CDF) is an XML standard used in conjunction with Microsoft Active Channel and Smart Offline Favorites technologies. Its use is to define a website's content and structure. The standard is somewhat similar to the RSS standard introduced by Netscape several years after CDF was introduced in 1997. The standard and Active Channel were introduced with the launch of Internet Explorer 4.0, while Smart Offline Favorites was introduced with the launch of Internet Explorer 5.0.

Active Channel allows websites to be listed and syndicated with the end-users' desktop. Smart Offline Favorites, like channels, enable users to view webpages from the cache.

However, unlike RSS, the idea of Active Channels was not widely accepted and its use was and still is very limited. As a direct result, Microsoft has removed CDF support from Internet Explorer 7.

Example

A generic CDF file:

<?xml version="1.0" encoding="UTF-8"?>
<CHANNEL HREF="http://domain/folder/pageOne.extension"
  BASE="http://domain/folder/"
  LASTMOD="1998-11-05T22:12"
  PRECACHE="YES"
  LEVEL="0">
    <TITLE>Title of your Channel</TITLE>
    <ABSTRACT>Synopsis of your channel's contents.</ABSTRACT>
    <SCHEDULE>
      <INTERVALTIME DAY="14"/>
    </SCHEDULE>
    <LOGO HREF="wideChannelLogo.gif" STYLE="IMAGE-WIDE"/>
    <LOGO HREF="imageChannelLogo.gif" STYLE="IMAGE"/>
    <LOGO HREF="iconChannelLogo.gif" STYLE="ICON"/>
    <ITEM HREF="pageTwo.extension"
      LASTMOD="1998-11-05T22:12"
      PRECACHE="YES"
      LEVEL="1">
        <TITLE>Page Two's Title</TITLE>
        <ABSTRACT>Synopsis of Page Two's contents.</ABSTRACT>
        <LOGO HREF="pageTwoLogo.gif" STYLE="IMAGE"/>
        <LOGO HREF="pageTwoLogo.gif" STYLE="ICON"/>
    </ITEM>
</CHANNEL>

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Meaning	Category
Cadillac Fairview Corporation	Business->NYSE Symbols
Channel Definition Format	Computing->General
Channel Definition Format ( Microsoft)	Computing->File Extensions
Charles Darwin Foundation	Community->Non-Profit Organizations
Church Development Fund	Community->Religion
Command Data File	Computing->General
Commissione delle Finanze	International->Italian
Common Data Format	Computing->File Extensions Academic & Science->Ocean Science Governmental->NASA
Cooperative Development Foundation	Community->Non-Profit Organizations
Core DIS Facility	Governmental->Military
Crystal Data File	Computing->General
Cumulative Distribution Function	Academic & Science->Mathematics
Cyberspace Description Format	Computing->File Extensions
Unidata NetCDF Graphics	Computing->File Extensions

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Channel Definition Format

Example

See also

External links