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<!-- Regina data file format documentation.
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See ../regina.sgml for further details. -->
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<refentry id="data-threeball">
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<refentrytitle>threeball</refentrytitle>
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<manvolnum>5reg</manvolnum>
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<refname>threeball</refname>
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<refpurpose>Does a triangulation represent the 3-dimensional ball?</refpurpose>
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<informaltable frame="all">
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<colspec colname="c1"/>
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<colspec colname="c2"/>
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<row><entry namest="c1" nameend="c2">
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<emphasis role="bold">Content Model</emphasis>
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<row><entry namest="c1" nameend="c2">
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threeball ::=</synopsis>
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<row><entry namest="c1" nameend="c2">
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<emphasis role="bold">Attributes</emphasis>
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<entry><emphasis role="bold">Name</emphasis></entry>
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<entry><emphasis role="bold">Type</emphasis></entry>
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<entry><sgmltag>value</sgmltag></entry>
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<entry><type>CDATA</type> (required)</entry>
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<title>Description</title>
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A &xml-threeball; element stores whether or not the parent
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triangulation is in fact a triangulation of the 3-dimensional ball.
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<title>Parents</title>
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The following elements contain <sgmltag>threeball</sgmltag>:
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<simplelist type="inline">
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<member>&xml-packet-triangulation;</member>
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<title>Children</title>
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Element <sgmltag>threeball</sgmltag> has no children.
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<title>Attributes</title>
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<term><sgmltag>value</sgmltag></term>
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Either <literal>T</literal> or <literal>F</literal>, according to
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whether the parent triangulation does or does not represent the