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Data Division in the DBCS Module
(VSC2) (MF)
The JUSTIFIED Clause
General Rule
The JUSTIFIED clause can be used with DBCS data items.
The PICTURE Clause
(VSC2) (MF)
General Rules
There are two additional categories of data that can be described with a
PICTURE clause: DBCS and DBCS edited. Both these categories must be
described as USAGE IS DISPLAY-1.
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|(MF) These categories need not be described as USAGE DISPLAY-1. |
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Rules for DBCS Data
1. Its PICTURE character-string can contain only the symbol "G" or
"N" (MF)
2. Its contents can be any characters in the DBCS character set.
Rule for DBCS Edited Data
Its PICTURE character string can contain any combination of the symbols
"G" and "B".
Symbols Used.
The functions of these symbols are as follows:
G - Each "G" represents a character position which can contain only a
DBCS character or a DBCS space.
B - Each "B" represents a character position into which the DBCS space
character will be inserted.
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|(MF) |
| |
| |
| |
|N - Each "N" represents a character position which can contain only |
| a DBCS character or a DBCS space. |
| |
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Note that each "G" or "B" or "N" (MF) represents a single double-byte
character position.
Editing Rules
The type of editing that can be performed on an item depends on the
category to which the item belongs. Table 3-1. (see the chapter The
Nucleus) is extended with the following information:
Table 11-1. Editing Types for Data Categories
Category Type of Editing
DBCS None
DBCS Edited Simple insertion "B" only
Fixed Insertion Editing.
When used in an SBCS item, "B" (space) represents an SBCS space. When
used in a DBCS item it represents a DBCS space.
The REDEFINES Clause
(VSC2) (MF)
Syntax Rule
If either data-name-1 or data-name-2 is of class DBCS, then both must be
of class DBCS.
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|(MF) This restriction is removed. |
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RENAMES Clause
(VSC2) (MF)
Syntax Rule
If either data-name-1 or data-name-2 is of class DBCS, then both must be
of class DBCS. No THROUGH clause is allowed.
The USAGE Clause
(VSC2) (MF)
General Format
The General Format is extended by the addition of the following:
[USAGE IS ] DISPLAY-1
Syntax Rules
1. The PICTURE character-string of a DISPLAY-1 item can contain only
"G"s and "B" s. An item whose PICTURE character-string contains
"G"s must have a USAGE IS DISPLAY-1 clause.
Note that therefore the USAGE IS DISPLAY-1 clause makes an item's
class DBCS.
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|(MF) |
|USAGE IS DISPLAY-1 is not required for items whose PICTURE clause |
|contains "G"s or "N"s. Whenever a PICTURE clause contains a "G" the |
|associated item is considered to be of class DBCS. |
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2. The BLANK WHEN ZERO clause cannot be used with group or elementary
items described as USAGE IS DISPLAY-1. The SYNCHRONIZED clause is
ignored.
General Rule
The USAGE IS DISPLAY-1 clause indicates that the format of the data is
DBCS.
The VALUE Clause
(VSC2) (MF)
Syntax Rules
1. In a data description entry, if the category of the item is DBCS
the literal in the VALUE clause must be of category DBCS. A DBCS
literal is allowed only if the category of the item is DBCS or if
the category of the item is DBCS edited.
2. A DBCS literal in the VALUE clause must not exceed the size given
by the PICTURE character-string.
CONDITION-NAME Rule
In a condition-name entry, if the associated data item is of category
DBCS, all literals in the VALUE clause must be of category DBCS. DBCS
literals are allowed only if the category of the associated data item is
DBCS.