There are 77 tags defined in XHTML 1.0:

a abbr acronym address area b base bdo big blockquote

body br button caption cite code col colgroup dd del

dfn div dl dt em fieldset form h1 h2 h3

h4 h5 h6 head hr html i img input ins

kbd label legend li link map meta noscript object ol

optgroup option p param pre q samp script select small span strong style sub sup table tbody td textarea tfoot th thead title tr tt ul var