Ya, my XHTML is garbage, thanks for reminding me.
The reason for using <em> over <i> or <b> in this situation is the idea of structure vs. presentation.
In an ideal world, your HTML would only mark up your content structurally ...
- <em> rather then <i> or <b> for emphasis
- <code> rather then <pre> for mono-spaced code
- <h1> for a headline instead of <font>
Why bother, you ask? (Well, even if you don't....) Because not all devices that render HTML pages are visual -- example, if someone is looking at your page on a Palm Pilot, then the palm can interpret emphasis the best way it can. Also, search engines are better equiped to deal with structural markup -- markup that signifies what type of data something is.
Once you can do all your mark-up structurally, you can use CSS to have your HTML visually styled in the user-agents that can handle it, and the ones that can't will still be able to digest it easily.
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
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Read Where should I post X? if you're not absolutely sure you're posting in the right place.
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Posts may use any of the Perl Monks Approved HTML tags:
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You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
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