The HTML acronym element, is used to markup a shortened form of a word or phrase, which creates a new pronounceable word. I.E. WAC for Washington Administrative Code
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DTD. Defines which document type the attribute is allowed. S=Strict, T=Transitional, F=Frameset.
The below shows how to shorten the pharse WAC, using acronym tags to apply the approiate semantic meaning.
<acronym title="Washington Administrative Code">WAC</acronym>