III-c Fix 2: Provide equivalent alternatives

Since text can be rendered visually, as speech, or as braille it helps many users.

In HTML, provide short functional equivalent text with the "alt" attribute:

 <img ... alt="Navigation Bar..." >
 <area .. alt="More Articles" >

Provide content for applets:

 <applet code="Lake.class">
     <param name="image" content="lh.gif">
     <img src="lh.gif" alt="Latest News">

Provide long descriptions for complex content (charts, graphs, etc.)

Related WCAG 1.0 checkpoints: 1.1 and 6.3. ATAG 1.0 checkpoints: 3.1, 3.3, 3.5.