170 lines
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HTML
170 lines
11 KiB
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<meta name="DC.Title" content="CCSID (Coded Character Set Identifier) keyword for physical and logical files" />
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<meta name="abstract" content="Use this file- or field-level keyword on physical files and this field-level keyword on logical files to specify a coded character set identifier (CCSID) for character fields." />
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<meta name="description" content="Use this file- or field-level keyword on physical files and this field-level keyword on logical files to specify a coded character set identifier (CCSID) for character fields." />
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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>Physical and Logical Files, CCSID</title>
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<body id="tdccsid"><a name="tdccsid"><!-- --></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">CCSID (Coded Character Set Identifier) keyword for physical and logical
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files</h1>
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<div><p>Use this file- or field-level keyword on physical files and this
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field-level keyword on logical files to specify a coded character set identifier
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(CCSID) for character fields.</p>
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<div class="section"><div class="p">The format of the keyword is: <pre>CCSID(value [field-display-length | *MIN | *LEN display-positions]
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[*CONVERT | *NOCONVERT] [*NORMALIZE])</pre>
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</div>
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<p>The value is
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a number up to 5 digits long that identifies a specific set of encoding scheme
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identifiers, character set identifiers, code page identifiers, and other relevant
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information that uniquely identifies the coded graphic character representation
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used for the data in the field.</p>
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<div class="p">For logical files, the following characteristics
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must be true before the CCSID keyword is allowed on a logical file field.
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<ul><li>If the specified value on the logical file CCSID keyword uses a Unicode
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encoding scheme, then the field data type must be G for a UCS-2 Level 1 or
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a UTF-16 encoding scheme, and the field data type must be A for a UTF-8 encoding
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scheme. Also, the corresponding physical file field must be of types A, G,
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or O.</li>
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<li>If the specified value on the logical file CCSID keyword does not use
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the Unicode encoding scheme, then the field data type must be A, O, or G.
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Also, the corresponding physical file field must be a G type field and have
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the CCSID keyword specified with a UCS-2 or UTF-16 value, or be an A (character)
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type field with a UTF-8 CCSID.</li>
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</ul>
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</div>
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<p>The field-display-length parameter is optional and is only used
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when the field is referenced by a field in a display file. The parameter is
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only valid when the value parameter is UCS-2 or UTF-16. The field-display-length
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allows the user to control the field size according to the UCS-2 or UTF-16
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data.</p>
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<p>A special value, *MIN, can be specified instead of a field-display-length.
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It can be defined in a physical file only for use by a referencing field in
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a display file DDS record format. This value is used to specify a field display
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length defined in terms of display positions. This value causes the field
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length on the screen to be equal to the field length defined in the DDS.</p>
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<p>A
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special value, *LEN, along with the display-positions value can be specified
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instead of a field-display-length. It can be defined in the physical file
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only for use by a referencing field in a display file DDS record format. This
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value is used to specify a field display length defined in terms of display
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positions. This value causes the field length on the screen to be equal to
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the display-positions value.</p>
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<p>The *CONVERT parameter
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is optional. It can be defined in a physical file only for use by a referencing
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field in a printer file DDS record format. The parameter specifies that, when
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the field prints, the UCS-2 or UTF-16 data is converted to the target CCSID
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specified on the CHRID command parameter on the CRTPRTF, CHGPRTF, or OVRPRTF
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command. If you do not specify this parameter, the keyword is set to *CONVERT
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as default. If you specify *NOCONVERT, the UCS-2 or UTF-16 data will be not
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converted to the target CCSID.</p>
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<p>The *NORMALIZE parameter is optional,
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but provides more predictable results when you are using UTF-8 and UTF-16
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data. You can use this parameter to combine characters in UTF-8 and UTF-16
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data. This support for combining characters allows a resulting character to
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be comprised of more than one character. After the first character, up to
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300 different nonspacing accent characters (umlaut, accent, and so on) can
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follow in the data string. If the resulting character is one that is already
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defined in the character set, normalization replaces the string of combining
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characters with the hex value of the defined character. If the resulting character
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is not a defined character, the combining character string is unchanged after
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normalization. For example, normalization of a UTF-16 graphic string of an
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'e' (X'0065') followed by an acute character (X'0301') results in the replacement
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character é (X'00E9').</p>
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<p>You can use the *NORMALIZE parameter only when
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the CCSID keyword is used at the field level. Without this keyword, the system
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assumes that data inserted or updated into UTF-8 and UTF-16 fields is already
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normalized. *NORMALIZE is valid only with a CCSID keyword UTF-16 value (on
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a graphic field) or UTF-8 value (on a character field).</p>
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<p>When specified
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at the file level for physical files, the CCSID keyword applies to each character
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field in the file except those character fields that also have the CCSID keyword
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specified. If the file level CCSID is UCS-2 or UTF-16, it is applied to any
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G field that does not have a CCSID keyword. If a CCSID value on the physical
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file field used the UCS-2 encoding scheme, the data type of this field must
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be type G. If a CCSID value on the physical file field used the UTF-8 encoding
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scheme, the data type of this field must be character. If a CCSID value on
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the physical file field used the UTF-16 encoding scheme, the data type of
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this field must be type G.</p>
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<p>If the CCSID keyword is not specified at
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the file level and not all character fields have the CCSID keyword specified,
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then the fields are assigned the job's default CCSID when the file is created.</p>
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</div>
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<div class="example"><h4 class="sectiontitle">Examples</h4><p>The following example shows how to specify
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the CCSID keyword for physical files.</p>
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<pre>|...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
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00010A CCSID(285)
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00020A R RECORD1
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00030A FIELD1 75G CCSID(13488)
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00040A FIELD2 150A
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00050A FIELD3 20A
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00060A FIELD4 10A CCSID(1208 *NORMALIZE)
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00070A FIELD5 10G CCSID(1200)
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A</pre>
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<p>FIELD1 is assigned a UCS-2-ccsid value of 13488. FIELD2
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and FIELD3 are assigned a CCSID value of 285. FIELD4 is assigned a UTF-8 CCSID
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value of 1208 and its data will be normalized before being inserted or updated
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in the file. FIELD5 is assigned a UTF-16 CCSID value of 1200 and its data
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will not be normalized before being inserted or updated in the file.</p>
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</div>
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<div class="example"><p>The following example shows how to specify the CCSID keyword on
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a corresponding logical file.</p>
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<pre>|...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
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00000A
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00010A R RECORD1
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00020A FIELD1 75A CCSID(37)
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00030A FIELD2 150G CCSID(13488 80)
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00040A FIELD3 20A
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00050A FIELD4 10G CCSID(1200 *NORMALIZE)
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00060A FIELD5 10A
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A</pre>
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<p>The logical file's FIELD1 is assigned a SBCS CCSID value
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of 37. Conversion occurs between the physical file and the logical file for
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FIELD1 because the physical file field contains UCS-2 data. The logical file's
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FIELD2 is assigned a UCS-2-ccsid value of 13488. Conversion occurs between
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the physical file and the logical file for FIELD2 because the logical file
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contains UCS-2 data. A CCSID is not specified for FIELD3. FIELD4 is assigned
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a UTF-16 CCSID value of 1200. Conversion occurs between the physical file
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and the logical file for FIELD4 because the physical file field contains UTF-8
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character data. The data will be normalized. FIELD5 is assigned the CCSID
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of the job in which the file is created. Conversion occurs between the physical
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file and the logical file for FIELD5 because the physical file
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field contains UTF-16 data. The data will not be normalized.</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/rzakcmstdfusc2.htm">CCSID (Coded Character Set Identifier) keyword</a></div>
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<div><a href="../nls/rbagsglobalmain.htm">i5/OS globalization</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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