Pathmaker Programming Guide

Designing a Pathmaker Application
Preparing for Pathmaker Application Development
067868 Tandem Computers Incorporated 2–17
Disk File Names. A disk file name is a name for a physical file. A disk file name consists
of a system name, volume name, subvolume name, and file ID.
Application developers specify disk file names for files such as service code files and
requester copy libraries.
A disk file name is specified in any of these forms:
\SYSTEM.$VOLUME.SUBVOLUME.FILENAME
$VOLUME.SUBVOLUME.FILENAME
SUBVOLUME.FILENAME
FILENAME
If you omit the system, volume, and subvolume names, the Pathmaker product
expands the name with the default system, volume, and subvolume as needed to
complete the name.
Disk file name rules are:
Names cannot contain spaces.
Names can have any combination of digits (0-9) and letters (A-Z, a-z):
System name Must begin with a backslash (\) followed by 1 to 7
alphanumeric characters; the first character must be a
letter.
Volume name Must begin with a dollar sign ($) followed by a letter.
Can be no longer than 6 characters if system name is used to
allow for network access; otherwise, can be up to 7
characters.
Subvolume name Must begin with a letter.
Can be no longer than 8 characters.
File name Must begin with a letter.
Can be no longer than 8 characters.
Table 2-2 lists some examples of logical and disk file names.
Table 2-2. Logical and Disk File Name Examples
Disk file names
Logical Names System Volume Subvolume File
Emp-file
EMPLOYEE
\ACCT
\X2
$Sales
$A
District
CNTY12
Srvcod1
DDLSRC
\X2.$A.CNTY12.DDLSRC is a complete disk file name.
Note The Pathmaker product upshifts all lowercase letters before storing names in the project catalog; for
example, emp-file becomes EMP-FILE.