Underline and Overline

4.15 Underline and Overline

\Configure{underline}
    {\HCode{<emphasis role="underline">}\:gobble}
    {\HCode{</emphasis>}}
\Configure{overline}
    {\HCode{<emphasis role="overline">}}
    {\HCode{</emphasis>}}

-_-_-

<..configure docbook plain ..>+

\Configure{underline}
    {\HCode{<emphasis role="underline">}\hbox\bgroup \:gobble}
    {\egroup \HCode{</emphasis>}}
\Configure{overline}
    {\HCode{<emphasis role="overline">}}
    {\HCode{</emphasis>}}

-_-_-

<..configure docbook-mml latex ..>+

\Configure{overline}
    {\bgroup\ifmathml <.mathml overline .>\else
          \HCode{<emphasis role="overline">}\fi}
    {\ifmathml <.end mathml overline .>\else \HCode{</emphasis>}\fi\egroup}
\Configure{underline}
    {\bgroup
     \ifmathml <.mathml underline .>%
     \else <.nomath underline .>\HCode{<emphasis role="underline">}\fi}
    {\ifmathml <.end mathml underline .>\else \HCode{</emphasis>}\fi \egroup}

-_-_-

<..mathml latex ..>

<.und/ov-erline .>

-_-_-

<..mathml plain ..>

<.und/ov-erline .>

-_-_-

<..und/ov-erline ..>

\Configure{overline}
    {\bgroup <.mathml overline .>}
    {<.end mathml overline .>\egroup}
\Configure{underline}
    {\bgroup \ifmmode <.mathml underline .>\else
      <.nomath underline .>\fi}
    {<.end mathml underline .>\egroup}

-_-_-

<..nomath underline ..>

\expandafter\everymath
\expandafter{\expandafter\everymath
\expandafter{\the\everymath}}%
\let\o::@underline:\o:@@underline:
\def\o:@@underline:{\let\o:@@underline:\o::@underline:}%

-_-_-

<..mathml overline ..>

\HCode{<\a:mathml mover accent="false"\Hnewline
\mml:class="mml-overline"><\a:mathml mrow>}%

-_-_-

<..end mathml overline ..>

\HCode{</\a:mathml mrow><\a:mathml mo\Hnewline
accent="true">&\#x00AF;</\a:mathml mo>%
</\a:mathml mover>}%

-_-_-

¯ is the code of &OverBar;

<..mathml underline ..>

\HCode{<\a:mathml munder \a:mathml accentunder="false"\Hnewline
\mml:class="mml-underline"><\a:mathml mrow>}%

-_-_-

<..end mathml underline ..>

\HCode{</\a:mathml mrow><\a:mathml mo\Hnewline
accent="true">&\#x0332;</\a:mathml mo></\a:mathml munder>}%

-_-_-

̲ is the code of &UnderBar;

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