147 lines
9.0 KiB
HTML
147 lines
9.0 KiB
HTML
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<meta name="DC.Title" content="Coded character set identifier keyword" />
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<meta name="abstract" content="Use this file-, record-, or field-level keyword to specify that a G-type field supports UTF-16 data instead of DBCS-graphical data. Each UTF-16 code unit (which includes UCS-2 characters) is two bytes long." />
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<meta name="DC.subject" content="CCSID (coded character set identifier) keyword, Coded character set identifier (CCSID) keyword" />
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<title>Coded character set identifier keyword</title>
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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">Coded character set identifier keyword</h1>
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<div><p>Use this file-, record-, or field-level keyword to specify that
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a G-type field supports UTF-16 data instead of DBCS-graphical data. Each UTF-16
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code unit (which includes UCS-2 characters) is two bytes long.</p>
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<div class="section"><p>The format of the keyword is:</p>
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<pre>CCSID(UTF16-CCSID | &UTF16-CCSID-field | *REFC
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[*CONVERT | *NOCONVERT]
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[alternate-field-length])</pre>
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<p>The UTF16-CCSID parameter is
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required. Use the UTF16-CCSID parameter to specify a CCSID (coded character
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set identifier) that uses the UTF-16 encoding scheme for this field. You can
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specify the UTF16-CCSID parameter either as a number up to 5 digits long or
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as a program-to-system field. You must define the program-to-system field
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with a length of 5 and with the S data type.</p>
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<p>You can specify a special
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value of *REFC instead of a UTF16-CCSID value. It is only valid on reference
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fields, and you must code the referenced field with a CCSID keyword that specifies
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a UTF16-CCSID value. Normally, the printer file CCSID keyword overrides any
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CCSID keyword attributes taken from the referenced field. If you specify *REFC,
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the UTF16-CCSID value comes from the referenced field.</p>
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<p>The *CONVERT
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parameter is optional and specifies whether the UTF-16 data is converted to
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a target CCSID specified on the CHRID parameter of the CRTPRTF, CHGPRTF, or
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OVRPRTF commands. *CONVERT is the default. If you specify the CCSID keyword
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with *NOCONVERT, the UTF-16 data is not converted to the target CCSID.</p>
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<p>If
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*NOCONVERT is active for a printer file whose DEVTYPE is *AFPDS, the application
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must also use either a TrueType font or one of the AFP™ Unicode migration fonts. If you do not
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specify either a TrueType font or one of the AFP Unicode migration fonts, the output will
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be interpreted as single-byte data and will probably be unprintable.</p>
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<p>If
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*NOCONVERT is active for a printer file whose DEVTYPE is *LINE or *AFPDSLINE,
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the application must also use one of the AFP Unicode migration fonts. If you do not
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specify an AFP Unicode
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migration font, the output will be interpreted as single-byte data and will
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probably be unprintable.</p>
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<p>If *NOCONVERT is active and the file DEVTYPE
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is *AFPDS, specify a TrueType font with the FONTNAME keyword, or specify an AFP Unicode
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migration font character set and code page with the FNTCHRSET keyword. If
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the file DEVTYPE is *LINE or *AFPDSLINE, specify the AFP Unicode migration font character set
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and code page in the page definition for the printer file.</p>
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<p>If *NOCONVERT
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is specified for a printer file whose DEVTYPE is *SCS, a diagnostic message
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is issued when the printer file is used, and the UTF-16 data is converted
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to the target CCSID.</p>
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<p>The alternate-field-length parameter is optional
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and is valid only when you specify the CCSID keyword at the field level and
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the *CONVERT parameter is active. Specify the alternate-field-length as the
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number of UTF-16 code units.</p>
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<p>When UTF-16 data is involved in an output
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operation and the *CONVERT parameter is active, the data is converted from
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the associated UTF-16 CCSID to the target CCSID. Generally, the length of
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the data will change when this conversion occurs. Therefore, you can use the
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alternate-field-length value to specify a printed field length that is different
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from the default printed field length. The default printed field length of
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a 'G' data type field is twice the number of characters that are specified
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for the field length.</p>
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<p>The alternate-field-length value can help avoid
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truncation of field data when the data length will be longer after conversion
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than the default printed field length. The alternate-field-length value can
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also help increase the available line space by limiting the printed field
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length when the data length will be shorter after conversion. The field length
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will still be used to define the field's output buffer length.</p>
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<p>For example,
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a printer file contains the following information:</p>
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<pre>FLD1 10G 2 2 CCSID(X Y)</pre>
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<ul><li>X is the UTF-16 CCSID associated with the field data. Y is the alternate-field-length
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of this field. If you did not specify Y, then the default printed field length
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of FLD1 is 20 printed positions (twice the number of UTF-16 code units specified
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on the field length).</li>
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<li>If you know that the UTF-16 data is constructed from single
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byte data, you can specify the alternate-field-length, Y, as 5 UTF-16 code
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units; FLD1 has a printed field length of 10 printed positions (twice the
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number of UTF-16 code units specified on the alternate-field-length).</li>
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<li>If you know that the UTF-16 data is constructed from double-byte
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data, you can specify the alternate-field-length, Y, as 11 UTF-16 code units;
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FLD1 has a printed field length of 22 printed positions (twice the number
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of UTF-16 code units specified on the alternate-field-length). This allows
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space for the shift-out and shift-in characters.</li>
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</ul>
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<p>If you specify the CCSID keyword at the field-level and either the
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record- or the file-level, the field-level keyword takes precedence. If the
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you specify the CCSID keyword at the file- or record-level and no G-type fields
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exist, then the keyword is ignored.</p>
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<p>On output, field data that is longer
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than the specified field length is truncated.</p>
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<p>The CCSID keyword is not
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valid for files whose DEVTYPE is *IPDS.</p>
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<p>You can specify the CCSID keyword
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with all keywords that are currently allowed on a G-type field.</p>
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<p>Option
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indicators are not valid for this keyword.</p>
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</div>
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<div class="section"><h4 class="sectiontitle">Example</h4><p>The following example shows how to specify
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the CCSID keyword.</p>
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<pre>|...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
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00010A CCSID(13488)
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00010A R RECORD1
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00020A FIELD1 30G
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00030A FIELD2 10G CCSID(1200 *CONVERT 6)
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00010A R RECORD2 CCSID(1200 *NOCONVERT)
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00020A FIELD3 20G
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A</pre>
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<p>FIELD1 is assigned a CCSID value of 13488. FIELD2 is
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assigned a CCSID value of 1200 and has a field length of 6 UTF-16 code units
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(12 SBCS characters). FIELD3 is assigned a CCSID value of 1200, and the data
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is not converted during an output operation.</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="ucs2kwd.htm" title="The CCSID keyword for printer files specifies that a G-type field supports UTF-16 data instead of DBCS-graphical data.">Keyword considerations for printer files that use UTF-16 data (positions 45 through 80)</a></div>
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</div>
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</div>
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