<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> <!--Converted with LaTeX2HTML 98.1p1 release (March 2nd, 1998) originally by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds * revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan * with significant contributions from: Jens Lippmann, Marek Rouchal, Martin Wilck and others --> <HTML> <HEAD> <TITLE>Command Overview</TITLE> <META NAME="description" CONTENT="Command Overview"> <META NAME="keywords" CONTENT="vol1"> <META NAME="resource-type" CONTENT="document"> <META NAME="distribution" CONTENT="global"> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"> <LINK REL="STYLESHEET" HREF="vol1.css"> <LINK REL="next" HREF="node67.html"> <LINK REL="previous" HREF="node64.html"> <LINK REL="up" HREF="node55.html"> <LINK REL="next" HREF="node66.html"> </HEAD> <BODY > <!--Navigation Panel--> <A NAME="tex2html1298" HREF="node66.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="icons.gif/next_motif.gif"></A> <A NAME="tex2html1294" HREF="node55.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="icons.gif/up_motif.gif"></A> <A NAME="tex2html1288" HREF="node64.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="icons.gif/previous_motif.gif"></A> <A NAME="tex2html1296" HREF="node1.html"> <IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="icons.gif/contents_motif.gif"></A> <A NAME="tex2html1297" HREF="node216.html"> <IMG WIDTH="43" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="index" SRC="icons.gif/index_motif.gif"></A> <BR> <B> Next:</B> <A NAME="tex2html1299" HREF="node66.html">List of Commands</A> <B> Up:</B> <A NAME="tex2html1295" HREF="node55.html">Table File System</A> <B> Previous:</B> <A NAME="tex2html1289" HREF="node64.html">Operations on Tables</A> <BR> <BR> <!--End of Navigation Panel--> <H1><A NAME="SECTION00860000000000000000"> </A> <A NAME="command-overview"> </A> <BR> Command Overview </H1> <P> In this section we include a short description of the table commands in alphabetical order, (see the Detailed Command Description in Volume C of the MIDAS User Guide for a more detailed explanation). <P> <DL COMPACT><DT>Reference to tables <DD>is done by the filename. The extension <TT>.tbl</TT> must be appended to the filename in commands which can work both on images and tables (e.g.: <TT>READ/DESCRIPTOR table.tbl</TT>). <P> <DT>Reference to columns <DD>can be done either by ``name'' or by ``number''. Columns are referred to by name as <TT>:label</TT>, where <TT>label</TT> is a character string (Note the starting colon `:' in front of `<TT>label</TT>'.) The string (max. 16 characters, case insensitive) should start with a letter and may contain alpha-numeric characters and the underscore symbol. Columns are referred by number as <TT>#n</TT>, where <TT>n</TT> is the integer defining the column position. <P> <DT>Access to rows <DD>can be done in two modes, ``sequential'' or ``direct''. <UL> <LI>Sequential access is defined by the row number as @<TT>n</TT>, where <TT>n</TT> is an integer constant. <LI>Direct access is done through the values in the reference column. </UL></DL> <P> <BR><HR> <!--Table of Child-Links--> <A NAME="CHILD_LINKS"> </A> <UL> <LI><A NAME="tex2html1300" HREF="node66.html">List of Commands</A> </UL> <!--End of Table of Child-Links--> <HR> <!--Navigation Panel--> <A NAME="tex2html1298" HREF="node66.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="icons.gif/next_motif.gif"></A> <A NAME="tex2html1294" HREF="node55.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="icons.gif/up_motif.gif"></A> <A NAME="tex2html1288" HREF="node64.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="icons.gif/previous_motif.gif"></A> <A NAME="tex2html1296" HREF="node1.html"> <IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="icons.gif/contents_motif.gif"></A> <A NAME="tex2html1297" HREF="node216.html"> <IMG WIDTH="43" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="index" SRC="icons.gif/index_motif.gif"></A> <BR> <B> Next:</B> <A NAME="tex2html1299" HREF="node66.html">List of Commands</A> <B> Up:</B> <A NAME="tex2html1295" HREF="node55.html">Table File System</A> <B> Previous:</B> <A NAME="tex2html1289" HREF="node64.html">Operations on Tables</A> <!--End of Navigation Panel--> <ADDRESS> <I>Petra Nass</I> <BR><I>1999-06-09</I> </ADDRESS> </BODY> </HTML>