69 lines
4.2 KiB
HTML
69 lines
4.2 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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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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<html lang="en-us" xml:lang="en-us">
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<meta name="DC.Title" content="Define a dependent relationship" />
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<meta name="abstract" content="A dependent relationship is a required relationship between parameters." />
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<meta name="description" content="A dependent relationship is a required relationship between parameters." />
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<meta name="DC.subject" content="command, CL, defining, dependent relationship, command definition, statement, DEP, DEP (Dependent) statement, use, example" />
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<meta name="keywords" content="command, CL, defining, dependent relationship, command definition, statement, DEP, DEP (Dependent) statement, use, example" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Define a dependent relationship</title>
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</head>
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<body id="ddrel"><a name="ddrel"><!-- --></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">Define a dependent relationship</h1>
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<div><p>A dependent relationship is a required relationship between parameters.</p>
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<div class="section"> <p>If a required relationship exists between parameters, and if
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parameter values must be checked when the command is run, use the Dependent
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(DEP) statement to define that relationship. Using the DEP statement, you
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can perform the functions that are listed below: </p>
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<ul><li>Specify the controlling conditions that must be true before the parameter
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relationships defined in the PARM parameter need to be true (CTL).</li>
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<li>Specify the parameter relationships that require testing if the controlling
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conditions defined by CTL are true (PARM).</li>
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<li>Specify the number of parameter relationships that are defined on the
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associated PARM statement that must be true if the control condition is true
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(NBRTRUE).</li>
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<li>Specify the message identifier of an error message in a message file that
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the system is to send to the display station user if the parameter dependencies
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have not been satisfied.</li>
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</ul>
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<p>In the following example, if the display station user
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specifies the TYPE(LIST) parameter, the display station user must also specify
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the ELEMLIST parameter. </p>
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<pre>DEP CTL(&TYPE *EQ LIST) PARM(ELEMLIST)</pre>
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<p>In the following example, the parameter &WRITER must never
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be equal to the parameter &NEWWTR. If this condition is not true, message <samp class="codeph">USR0001</samp> is
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issued to the display station user. </p>
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<pre>DEP CTL(*ALWAYS) PARM((&WRITER *NE &NEWWTR)) MSGID(USR0001)</pre>
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<p>In the following example, if the display station user specifies
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the FILE parameter, the display station user must also specify both the VOL
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and LABEL parameters. </p>
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<pre>DEP CTL(FILE) PARM(VOL LABEL) NBRTRUE(*EQ 2)</pre>
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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="dflst.htm" title="You can define a parameter to accept a list of values instead of just a single value.">Define lists for parameters</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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