84 lines
4.8 KiB
HTML
84 lines
4.8 KiB
HTML
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<title>Conventions and terminology used in the DDS information</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">Conventions and terminology used in the DDS information</h1>
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<div><p>The DDS information uses specific phrases and terms to describe
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key concepts.</p>
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<p>When you read the DDS information in the information center, be aware of
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the following conventions:</p>
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<ul><li>A <em>keyword</em> is a name that identifies a function.</li>
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<li>A <em>parameter</em> is an argument shown between the parentheses on a keyword
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that identifies a value or set of values you can use to tailor the function
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the keyword specifies.</li>
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<li>A <em>value</em> is an actual value that you can use for a parameter.</li>
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<li>In the keyword descriptions, <em>this field</em> or <em>this record format</em> means
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the field or record format you are defining.</li>
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<li>The expression <em>use this file- or record-level keyword</em> means that
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the keyword is valid only at the file or record level.</li>
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<li><em>To specify a keyword</em> means to code the keyword in the DDS for a
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file. This contrasts with <em>to select a keyword</em> or <em>when a keyword
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is in effect</em>, which both mean that any conditioning (such as one or more
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option indicators) is satisfied when an application program issues an input
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or output operation.</li>
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<li><em>Current source</em> or <em>source you are defining</em> means the DDS
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that together make up the description of one file.</li>
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<li>In sample displays, character fields are shown as Xs and numeric fields
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are shown as Ns.</li>
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<li>The 5250 Work Station Feature is a feature of the OS/2<sup>®</sup> communications manager that allows
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the personal computer to perform like a 5250 display station and use functions
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of <span class="keyword">i5/OS™</span>.</li>
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<li><em>Logical file</em> includes join logical files, simple logical files,
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and multiple-format logical files.</li>
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<li><em>Page</em> means to move information up or down on the display. <em>Roll</em> means
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the same as page. <em>Paging keys</em> are the same as <em>roll keys</em>. The
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PAGEDOWN keyword is the same as the ROLLUP keyword. The PAGEUP keyword is
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the same as the ROLLDOWN keyword.</li>
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<li>Keyword descriptions use the following punctuation marks to indicate the
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syntax for the keyword: <dl><dt class="dlterm">()</dt>
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<dd>Enclosed values are required.</dd>
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<dt class="dlterm">[]</dt>
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<dd>Enclosed values are optional.</dd>
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<dt class="dlterm">[...]</dt>
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<dd>Specify additional values as needed.</dd>
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<dt class="dlterm">{}</dt>
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<dd>The upper value is the default value.</dd>
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<dt class="dlterm">|</dt>
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<dd>Specify either the value to the left or to the right (may refer to optional
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values).</dd>
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</dl>
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</li>
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</ul>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="coderules.htm" title="When you describe data attributes with DDS, you need to be aware of specific coding rules, naming conventions, and terminology.">DDS coding rules, conventions, and terms</a></div>
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