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<h4 class="subsection">17.4.3 <code>@value</code> Example</h4>

<p>You can use the <code>@value</code> command to minimize the number of
places you need to change when you record an update to a manual. 
See <a href="GNU-Sample-Texts.html#GNU-Sample-Texts">GNU Sample Texts</a>, for the full text of an example of using this
to work with Automake distributions.

  <p>This example is adapted from <a href="../make/index.html#Top">Overview</a>.

     <ol type=1 start=1>
<li>Set the flags:

     <pre class="example">          @set EDITION 0.35 Beta
          @set VERSION 3.63 Beta
          @set UPDATED 14 August 1992
          @set UPDATE-MONTH August 1992
</pre>
     <li>Write text for the <code>@copying</code> section (see <a href="copying.html#copying">copying</a>):

     <pre class="example">          @copying
          This is Edition @value{EDITION},
          last updated @value{UPDATED},
          of @cite{The GNU Make Manual},
          for @code{make}, version @value{VERSION}.
          
          Copyright ...
          
          Permission is granted ...
          @end copying
</pre>
     <li>Write text for the title page, for people reading the printed manual:

     <pre class="example">          @titlepage
          @title GNU Make
          @subtitle A Program for Directing Recompilation
          @subtitle Edition @value{EDITION}, ...
          @subtitle @value{UPDATE-MONTH}
          @page
          @insertcopying
          ...
          @end titlepage
</pre>
     <p class="noindent">(On a printed cover, a date listing the month and the year looks less
fussy than a date listing the day as well as the month and year.)

     <li>Write text for the Top node, for people reading the Info file:

     <pre class="example">          @ifnottex
          @node Top
          @top Make
          
          @insertcopying
          ...
          @end ifnottex
</pre>
     <p>After you format the manual, the <code>@value</code> constructs have been
expanded, so the output contains text like this:

     <pre class="example">          This is Edition 0.35 Beta, last updated 14 August 1992,
          of `The GNU Make Manual', for `make', Version 3.63 Beta.
</pre>
     </ol>

  <p>When you update the manual, you change only the values of the flags; you
do not need to edit the three sections.

  </body></html>

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