85 lines
5.1 KiB
HTML
85 lines
5.1 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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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="security" content="public" />
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<meta name="Robots" content="index,follow" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Positional entry considerations for display files that use Unicode data" />
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<meta name="abstract" content="The topic describes, by position, DDS for describing display files. Positions not mentioned have no special considerations for Unicode." />
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<meta name="description" content="The topic describes, by position, DDS for describing display files. Positions not mentioned have no special considerations for Unicode." />
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<meta name="DC.subject" content="Unicode, positional entries" />
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<meta name="keywords" content="Unicode, positional entries" />
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<meta name="DC.Relation" scheme="URI" content="rzakcvalentries.htm" />
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<meta name="DC.Relation" scheme="URI" content="dspfil.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2001, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2001, 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="ucs2pos" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Positional entry considerations for display files that use Unicode
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data</title>
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</head>
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<body id="ucs2pos"><a name="ucs2pos"><!-- --></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">Positional entry considerations for display files that use Unicode
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data</h1>
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<div><p>The topic describes, by position, DDS for describing display files.
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Positions not mentioned have no special considerations for Unicode.</p>
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<div class="section"><h4 class="sectiontitle">Length (positions 30 through 34)</h4><p>Specify the length
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of the field in these positions. The length of a field containing Unicode
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data can range from 1 through 16 381 code units.</p>
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<p>When
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determining the program length of a field containing Unicode data, consider
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the following rules:</p>
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<ul><li>Each Unicode code unit is 2 bytes long.</li>
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<li>The program length of the field is specified in number of Unicode code
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units. For example, a field containing 3 Unicode code units has 6 bytes of
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data.</li>
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<li>The field's default display length is equal to the field's program length
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or 2 times the number of Unicode code units.</li>
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<li>After converting between Unicode data and EBCDIC, the resulting data can
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be equal to, longer or shorter than the original length data before the conversion,
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depending upon the CCSID of the device. For example, 1 Unicode code unit is
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composed of 2 bytes of data. That code unit might convert to 1 SBCS character
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composed of 1 byte of data, 1 graphic-DBCS character composed of 2 bytes of
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data, or 1 bracketed DBCS character composed of 4 bytes of data.</li>
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<li>The field's display length can be specified separately from the program
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length by using the alternate-field-length parm on the CCSID keyword.</li>
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</ul>
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</div>
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<div class="section"><h4 class="sectiontitle">Data type (position 35)</h4><p>The only valid data type
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for Unicode data is the G data type.</p>
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<dl><dt class="dlterm">G (Graphic)</dt>
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<dd>Type G in combination with the CCSID keyword to specify this field contains
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Unicode data. <p>Normally, by specifying G, the field contains graphic-DBCS
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data. In combination with the CCSID keyword, the field now contains Unicode
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data. On output, the data is mapped to corresponding characters in the CCSID
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that the device is configured as. On input, the data is mapped to corresponding
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Unicode code units.</p>
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</dd>
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</dl>
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</div>
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<div class="section"><h4 class="sectiontitle">Decimal positions (positions 36 and 37)</h4><p>Leave these
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positions blank when using Unicode data.</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="dspfil.htm" title="Unicode is a universal encoding scheme for written characters and text that enables the exchange of data internationally. Two transformation formats, UTF_16 and UCS_2, of Unicode are supported with DDS.">Unicode considerations for display files</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="rzakcvalentries.htm" title="The table in this topic shows a list of valid entries for display files.">Valid entries 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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