XHTML Strict Specs, Part 1

Guidelines

Note about the Exceptions

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• XHTML 1.0

  These exceptions — the width, height, align, and valign attributes in the th and td tags — do validate for XHTML 1.0.

• XHTML 2.0

  However, they are being dropped from XHTML version 2. They do not exist in version 2. Their effects will be handled by CSS.

• HTML 5.0

  They are also being disallowed from the forthcoming HTML version 5, because they are presentational attributes … better handled by CSS, according to the W3C, Absent Attributes, "HTML 5 differences from HTML 4," Working Draft (9 June 2008).