In linguistics, examples, glosses, or parts thereof are
often prefixed with symbols like "*", "?", "?*", "(?)", "#"
etc., specifying the type or degree of (un)acceptability.
(Unfortunately, there is no consensus as to the
inventory and exact interpretation of these symbols.)
These specifications could be easily represented in TEI
by an optional "accept" attribute on <mentioned>,
<gloss>, and <seg>. The value of the attribute should
directly give the symbol instead of some fixed
meta-value like "yes" or "no".