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<TITLE>SDF 2.001: SDF Reference: Miscellaneous Variables</TITLE>
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<H1>13. Variables</H1>
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<H2><A NAME="Overview">13.1. Overview</A></H2>
<P>The categories of predefined variables are:</P>
<OL>
<LI>Conversion variables
<LI>Document variables
<LI>File variables
<LI>Miscellaneous variables.</OL>
<P>Date-time variables are in units of <EM>seconds since January 1, 1970</EM>. To format a time, use the <EM>FormatTime</EM> subroutine.</P>
<P>Further details on each group of variables are provided below.</P>
<P><A HREF="var_conv.html">Conversion Variables</A></P>
<P><A HREF="var_doc.html">Document Variables</A></P>
<P><A HREF="var_file.html">File Information Variables</A></P>
<P><A HREF="var_misc.html">Miscellaneous Variables</A></P>
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