5.3 Theorem

<..ams art,proc,book..>+
 \ifx \deferred@thm@head\:UnDef\else
    <.shared ams thm/cls.>
 \fi
-_-_-

<..configure docbook amsthm..>
 <.shared ams thm/cls.>
-_-_-

<..shared ams thm/cls..>
 \Configure{proof}
    {\IgnorePar\EndP\HCode{<blockquote role="proof"><title>}\IgnorePar}
    {\ifvmode \IgnorePar\fi\EndP\HCode{</title>}\ShowPar\par}
    {\IgnorePar\EndP\HCode{</blockquote>}\ShowPar\par}
-_-_-