94 lines
5.6 KiB
HTML
94 lines
5.6 KiB
HTML
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<meta name="DC.Title" content="DUP (Duplication) keyword for display files" />
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<meta name="abstract" content="Use this field-level keyword to activate the Dup key on the display station keyboard." />
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<meta name="description" content="Use this field-level keyword to activate the Dup key on the display station keyboard." />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>DUP (Duplication) keyword for display files</title>
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</head>
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<body id="rzakcmstdfdup"><a name="rzakcmstdfdup"><!-- --></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">DUP (Duplication) keyword for display files</h1>
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<div><p>Use this field-level keyword to activate the Dup key on the display
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station keyboard.</p>
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<p>Press the Dup key when the cursor is in this input-capable
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field. This indicates that data for this field is to be duplicated from the
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record sent in the previous input operation. The actual duplication is the
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responsibility of your program.</p>
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<p>See the <a href="s36env.htm">System/36 environment considerations for display files</a> topic for special considerations
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when specifying the DUP keyword in files that are used in the System/36™ environment.</p>
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<div class="p">The format of the keyword is: <pre>DUP[(response-indicator ['text'])]</pre>
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</div>
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<p>You cannot specify the DUP keyword on a floating-point field (F in position
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35).</p>
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<p>You should specify a response indicator for a numeric field defined with
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this keyword. Hex 1Cs for numeric fields will not be returned to your buffer,
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but hex F0s will be returned for the remaining field positions.</p>
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<p>Option indicators are valid for this keyword.</p>
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<div class="section"><h4 class="sectiontitle">Restrictions on validity checking</h4><p>Validity checking keywords
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(CHECK, COMP, RANGE, and VALUES) can be specified with the DUP keyword. However,
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they have no effect if the Dup key has been pressed.</p>
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<p>If another field
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in the record format fails validity checking, the <span class="keyword">i5/OS™</span> operating
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system tries to read the display again. The DUP response indicator is still
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returned to your program in the on condition, even if the workstation user
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does not type over the DUP characters or presses the Dup key again.</p>
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</div>
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<div class="example"><h4 class="sectiontitle">Example</h4><p>The following example shows how to specify
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the DUP keyword.</p>
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<pre>|...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
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00010A R RECORD1
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00020A FLDA 5 I 3 2
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00030A 15 DUP(16 'FLDA was duped')
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00040A FLDAH 5 2H
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A</pre>
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<p>FLDA is an input-capable character and hexadecimal field
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for which the workstation user can press the Dup key. In your program, you
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must test the data in FLDA to ensure that it includes only the digits 0 through
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9. In RPG III, you can use the TESTN operation code. In COBOL, you can use
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a numeric class test. In BASIC, you can specify an ON CONV statement earlier
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in the program than the statement with which you assign FLDA to FLDAH. In
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PL/I, you can specify an ON statement with the ERROR condition earlier in
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the program than the statement with which you assign FLDA to FLDAH.</p>
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<p>Field
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FLDAH is a hidden numeric field with the same length as FLDA. When the application
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program reads RECORD1 and finds response indicator 16 set off, the program
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moves FLDA to FLDAH and uses FLDAH (which is a numeric field). When the application
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program reads RECORD1 and finds response indicator 16 set on, the Dup key
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was pressed and FLDA contains hex 1Cs. The program uses FLDAH without changing
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its contents (which are the contents from the previous input received from
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the display device).</p>
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</div>
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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="rzakcmstdfdupprogramming.htm">Programming for the Dup key</a></strong><br />
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Read this topic to learn the procedure of duplicating entire fields.</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="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>
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</body>
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</html>
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