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W3C Schema namespacesee Namespaces and MathML
warninguse <boxed-text>
WCAGsee Accessibility
website, cited examplesee Website
web summarysee @abstract-type
western name formatuse @name-style
what are you countinguse @count-type
where listuse <legend>
which term to usesee @term-status
whitespacesee <preformat>see @xml:space
widthsee @cellspacing
winteruse <season>
word indexsee <glossary>
writing, contribution tosee <role>