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header, tablesee <thead>

header cellsee <th>

headinguse <title>

highlightsee <emphasis>

horizontal alignmentuse @alignsee @charsee @charoff

horizontal offsetuse @charoff

horizontal spanninguse @colspan

Href (Linking Mechanism)

hypertext linksee <link>

A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U - V - W - X