<title>Introduction to <application>DocBook <acronym>SGML</acronym><acronym>DTD</acronym></application></title>
<para>The <application>DocBook <acronym>SGML</acronym><acronym>DTD</acronym></application> package contains document type definitions for verification of
<acronym>SGML</acronym> data files against the DocBook rule set. These are
useful for structuring books and software documentation to a standard
allowing you to utilize transformations already written for that