Case Study: MediaObjects

<!DOCTYPE mediaobject PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
          "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd">
<mediaobject>
<imageobject>
  <imagedata fileref="emc2.svg"/>
</imageobject>
<imageobject>
  <imagedata fileref="emc2.eps" format="EPS"/>
</imageobject>
<imageobject>
  <imagedata fileref="emc2.png" format="PNG"/>
</imageobject>
<imageobject>
  <imagedata fileref="emc2.gif" format="GIF"/>
</imageobject>
<textobject>
  <para>Energy is equal to mass times the speed of light squared.</para>
</textobject>
<textobject>
  <phrase>E=mc^2</phrase>
</textobject>
</mediaobject>