<!DOCTYPE root SYSTEM "dtdtest.dtd">
<root>
    <!--
	This primarily bangs on different ways of expressing
	optionality in content models.
    -->
    <once><e/></once>

    <twice><e/><e/></twice>


    <once-or-twice-a><e/></once-or-twice-a>
    <once-or-twice-b><e/></once-or-twice-b>
    <once-or-twice-c><e/></once-or-twice-c>
    <once-or-twice-d><e/></once-or-twice-d>
    <once-or-twice-e><e/></once-or-twice-e>

    <once-or-twice-a><e/><e/></once-or-twice-a>
    <once-or-twice-b><e/><e/></once-or-twice-b>
    <once-or-twice-c><e/><e/></once-or-twice-c>
    <once-or-twice-d><e/><e/></once-or-twice-d>
    <once-or-twice-e><e/><e/></once-or-twice-e>


    <once-or-more-a><e/></once-or-more-a>
    <once-or-more-b><e/></once-or-more-b>
    <once-or-more-c><e/></once-or-more-c>
    <once-or-more-d><e/></once-or-more-d>
    <once-or-more-e><e/></once-or-more-e>

    <once-or-more-a><e/><e/></once-or-more-a>
    <once-or-more-b><e/><e/></once-or-more-b>
    <once-or-more-c><e/><e/></once-or-more-c>
    <once-or-more-d><e/><e/></once-or-more-d>
    <once-or-more-e><e/><e/></once-or-more-e>

    <once-or-more-a><e/><e/><e/></once-or-more-a>
    <once-or-more-b><e/><e/><e/></once-or-more-b>
    <once-or-more-c><e/><e/><e/></once-or-more-c>
    <once-or-more-d><e/><e/><e/></once-or-more-d>
    <once-or-more-e><e/><e/><e/></once-or-more-e>

    <once-or-more-a><e/><e/><e/><e/></once-or-more-a>
    <once-or-more-b><e/><e/><e/><e/></once-or-more-b>
    <once-or-more-c><e/><e/><e/><e/></once-or-more-c>
    <once-or-more-d><e/><e/><e/><e/></once-or-more-d>
    <once-or-more-e><e/><e/><e/><e/></once-or-more-e>


</root>