DDL Language Elements
Data Definition Language (DDL) Reference Manual — 426798-002
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DDL File Names
°
Underscore (_)
•
The name must start with a letter or an underscore.
•
The name must not end with a hyphen.
•
Uppercase letters are not distinguished from lowercase letters unless specified.
Some examples of valid DDL names follow:
If a DDL elementary field name is not unique, you can make the name unique by
qualifying it with a record name or with one or more group names. For example, the
following field names are qualified:
DDL File Names
The DDL compiler recognizes two kinds of DDL file names:
•
Local file names
•
Network file names
You specify these names exactly like file names.
Local File Names
Local file names identify files on a single system (or node). If the local file name is not
in the current subvolume or volume, you must qualify the name with a specific
subvolume or volume.
Note. DDL supports the underscore as a part of the identifier.
Note. SPI variable names and other names defined by HP begin with the letter Z. To avoid the
possibility of conflict with a current or future HP name, you should not begin a name with the
letter Z unless you are referring to an existing SPI name, such as ZSPI-TKN-RETCODE.
A1
field-2
Employee-record-1
NEW-EMPLOYEE-
NUMBER
_EMP
_EMP_
ZSPI-TKN-RETCODE
SPI name (see note)
VST200.vsd
CUSTOMER.CUSTNUM
CUSTINFO.ADDR.CITY
record.field
group.group.field
VST201.vsd