94 lines
4.8 KiB
HTML
94 lines
4.8 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.Type" content="reference" />
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<meta name="DC.Title" content="CHECK (Check) keyword for physical and logical files" />
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<meta name="abstract" content="Use this field-level keyword to specify validity checking in display files." />
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<meta name="description" content="Use this field-level keyword to specify validity checking in display files." />
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<meta name="DC.subject" content="CHECK (Check) keyword" />
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<meta name="keywords" content="CHECK (Check) keyword" />
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<meta name="DC.Relation" scheme="URI" content="rzakbmstlfkeyw.htm" />
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<meta name="DC.Relation" scheme="URI" content="../rzakc/rzakcmstpos29.htm" />
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<meta name="DC.Relation" scheme="URI" content="../rzakc/rzakcmstdfcheck.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2001, 2006" />
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<meta name="DC.Identifier" content="tdcheck" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Physical and Logical Files, CHECK</title>
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</head>
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<body id="tdcheck"><a name="tdcheck"><!-- --></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">CHECK (Check) keyword for physical and logical files</h1>
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<div><p>Use this field-level keyword to specify validity checking in display
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files.</p>
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<div class="section"><div class="p">The format of the keyword is: <pre>CHECK(edit-check-code [. . .])</pre>
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</div>
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<p>CHECK
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does not affect the physical or logical file being defined. When you define
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an input-capable field in a display file, refer to the field you are defining
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by specifying R in position 29 and using the REF or REFFLD keyword. At display
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file creation, the operating system copies the CHECK keyword and other field
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attributes from the field in the physical or logical file into the field in
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the display file. You can override the CHECK keyword (as well as all other
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validity checking keywords and the CHKMSGID keyword) by specifying any validity
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checking keyword for the field in the display file.</p>
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<div class="p">The rules for specifying
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this keyword in a physical or logical file are similar to those for a display
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file. However, only the following codes are allowed in physical or logical
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files: <dl><dt><strong>Code</strong></dt>
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<dd><strong>Meaning</strong></dd>
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<dt class="dlterm">AB</dt>
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<dd>Allow blank</dd>
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<dt class="dlterm">ME</dt>
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<dd>Mandatory enter</dd>
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<dt class="dlterm">MF</dt>
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<dd>Mandatory fill</dd>
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<dt class="dlterm">M10</dt>
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<dd>IBM<sup>®</sup> Modulus
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10 self-check algorithm</dd>
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<dt class="dlterm">M10F</dt>
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<dd>IBM Modulus
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10 self-check algorithm</dd>
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<dt class="dlterm">M11</dt>
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<dd>IBM Modulus
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11 self-check algorithm</dd>
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<dt class="dlterm">M11F</dt>
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<dd>IBM Modulus
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11 self-check algorithm</dd>
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<dt class="dlterm">VN</dt>
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<dd>Validate name</dd>
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<dt class="dlterm">VNE</dt>
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<dd>Validate name extended</dd>
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</dl>
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</div>
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<p>You cannot specify the CHECK(AB), CHECK(VN), CHECK(VNE),
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CHECK(M10), CHECK(M11), CHECK(M10F), or CHECK(M11F) keywords on a floating-point
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field (F in position 35). You cannot specify the CHECK keyword on a hexadecimal
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field (H in position 35). Do not specify the CHECK keyword on a date, time,
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or timestamp field (L, T, or Z in position 35).</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="rzakbmstlfkeyw.htm" title="This topic lists valid keyword entries for describing physical and logical files. They are typed in positions 45 through 80 (functions).">Keyword entries for physical and logical files (positions 45 through 80)</a></div>
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</div>
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<div class="relinfo"><strong>Related information</strong><br />
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<div><a href="../rzakc/rzakcmstpos29.htm">Reference for display files (position 29)</a></div>
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<div><a href="../rzakc/rzakcmstdfcheck.htm">CHECK (Check) 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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