122 lines
7.2 KiB
HTML
122 lines
7.2 KiB
HTML
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<meta name="DC.Title" content="DFT (Default) keyword for display files" />
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<meta name="abstract" content="Use this field-level keyword to specify the constant value for constant fields (unnamed fields) and to specify a default value for named fields." />
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<meta name="description" content="Use this field-level keyword to specify the constant value for constant fields (unnamed fields) and to specify a default value for named fields." />
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<meta name="keywords" content="DFT (Default) keyword, Default (DFT) keyword" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2001, 2006" />
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<title>DFT (Default) keyword for display files</title>
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</head>
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<body id="rzakcmstdfdft"><a name="rzakcmstdfdft"><!-- --></a>
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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">DFT (Default) keyword for display files</h1>
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<div><p>Use this field-level keyword to specify the constant value for
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constant fields (unnamed fields) and to specify a default value for named
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fields.</p>
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<div class="section"><p>The format of the keyword is:</p>
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<pre>DFT('value') | 'value'</pre>
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<p>The
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maximum number of characters you can specify in the literal is set by the
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size of the display on which the field is to be displayed as follows:</p>
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<dl><dt><strong>Size of display</strong></dt>
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<dd><strong>Maximum characters</strong></dd>
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<dt class="dlterm">24 x 80</dt>
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<dd>1919</dd>
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<dt class="dlterm">27 x 132</dt>
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<dd>3563</dd>
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</dl>
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</div>
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<div class="section"><h4 class="sectiontitle">Constant fields</h4><p>The value of a constant field can
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be specified as a value enclosed by single quotation marks. (For other ways to specify
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a constant field, see the DATE, MSGCON, and TIME keywords.) You can omit the
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DFT keyword itself, as well as the parentheses, to simplify the DDS. Whether
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you specify the DFT keyword explicitly or implicitly, the <span class="keyword">i5/OS™</span> operating
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system displays the specified value as a constant field on the display. See <a href="pos1928.htm">Name for display files (positions 19 through 28)</a> for a description of constant fields.</p>
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</div>
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<div class="section"><h4 class="sectiontitle">Named fields</h4><p>For input-only fields, the specified
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value is displayed each time the field is displayed. The displayed value can
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then be changed by the workstation user and returned to your program.</p>
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<p>For
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output-only and input/output fields, you must also specify PUTOVR at the record
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level and OVRDTA at the field level with the DFT keyword. The specified value
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is displayed only on the first output operation. On subsequent output operations,
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the program value is displayed.</p>
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<p>The DFTVAL, EDTCDE, and EDTWRD keywords
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cannot be specified with the DFT keyword.</p>
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<p>The DFT keyword is not valid
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on floating point fields.</p>
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<p>Option indicators are not valid for this keyword,
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although option indicators can be used to condition the field (whether constant
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or named) on which it is specified.</p>
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</div>
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<div class="example"><h4 class="sectiontitle">Example 1</h4><p>The following example shows how to specify
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the DFT keyword.</p>
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<pre>|...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
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00030A HOTTYP 1 I 7 9DFT('D')
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00040A VALUES('D' 'S')
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00050A 8 9'ON'
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00060A 01 12 1'HOTEL NAME: 'TERRACE INN'
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00070A TEXT('Constant field is +
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00080A conditioned, not the implicit +
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00090A DFT keyword')
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00100A 02 12 1'HOTEL NAME: 'RIVER VIEW INN'
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00110A TEXT('Either 'TERRACE INN' or +
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00120A 'RIVER VIEW INN' could +
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00130A appear in line 12, position 1')
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A</pre>
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<p>The constant field <em>ON</em>, having no option indicators,
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is always displayed.</p>
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<p>If indicator 01 is on, the following
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information is displayed:</p>
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<pre>HOTEL NAME: 'TERRACE INN'</pre>
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<p>If indicator 02 is on and indicator 01 is off,
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the following information is displayed:</p>
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<pre>HOTEL NAME: 'RIVER VIEW INN'</pre>
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</div>
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<div class="example"><h4 class="sectiontitle">Example 2</h4> <p>If you are specifying a constant field
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for more than one display size, and you are changing the location of the field
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but not the contents of the field for the different display sizes, then do
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not repeat the value. The following example shows how to do this.</p>
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<pre>|...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
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00010A DSPSIZ(*DS3 *DS4)
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A :
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A :
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00080A 22 2'Constant data'
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00090A 26 2
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A</pre>
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<p>The constant field <em>Constant data</em> appears on line
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22, position 2, on the 24 x 80 display screen, and it appears on line 26,
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position 2, on the 27 x 132 display.</p>
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</div>
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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="rzakcmstkeyent.htm" title="You type the keyword entries that define display files in positions 45 through 80 (functions).">DDS keyword entries for display files (positions 45 through 80)</a></div>
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</div>
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<div class="relref"><strong>Related reference</strong><br />
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<div><a href="rzakcmstdfputov.htm" title="Use this record-level keyword to permit the override of either display attributes or data contents (or both) of specific fields within a record displayed on a workstation device. By using PUTOVR, you can reduce the amount of data sent to the display device.">PUTOVR (Put with Explicit Override) keyword for display files</a></div>
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</div>
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</div>
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</body>
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</html>
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