| Converting to XHTML and CSS |
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| • | Proper DOCTYPE
and namespace |
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| • | Declare your
content type |
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| • | Write all tags in
lowercase |
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| • | Quote all
attribute values |
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| • | All attributes
require values |
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| • | Close all tags |
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| • | Close “empty”
tags with a space and a dash |
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| • | No double dashes
within a comment |
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| • | Encode all <
and & characters |
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