54 lines
3.6 KiB
HTML
54 lines
3.6 KiB
HTML
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<meta name="abstract" content="This topic provides information about coding physical and logical files that use DDS, and describes the positional entries used by these files." />
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<title>Define physical and logical files using DDS</title>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Define physical and logical files using DDS</h1>
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<div><p>This topic provides information about coding physical and logical
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files that use DDS, and describes the positional entries used by these files.</p>
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</div>
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<div>
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<ul class="ullinks">
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<li class="ulchildlink"><strong><a href="dphydds.htm">Define a physical file using DDS</a></strong><br />
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You use file-level, record-level, field-level, and key-field-level entries to define a physical file with DDS.</li>
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<li class="ulchildlink"><strong><a href="ldef.htm">Define a logical file using DDS</a></strong><br />
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A logical file determines how data records are selected and defined
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when read by an application program. A logical file can be a <em>simple</em>, <em>multiple
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format</em>, or <em>join</em> logical file.</li>
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<li class="ulchildlink"><strong><a href="rzakbmstlfpos.htm">Positional entries for physical and logical files (positions 1 through 44)</a></strong><br />
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The first 44 positions of the DDS form are called positional entries.</li>
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</ul>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="kickoff.htm" title="You can use data description specifications (DDS) to define physical and logical database files. This topic provides the information you need to code the positional and keyword entries that define these files.">DDS for physical and logical files</a></div>
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