Used for SQL examples and other code listings.
In the output created from the XML (HTML, PDF, CHM, and so
forth), everything between
<programlisting>
and
</programlisting>
is displayed literally.
When you indent a program listing the indentation also shows
literally.
Within programlisting
elements, make sure
that code lines do not run longer than 72 characters. Code lines
should be indented using spaces, not tabs.