TAL Programmer's Guide

Disk File Names
File Names and TACL Commands
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File ID
The file ID, such as MYFILE, is the identifier of the file in the subvolume. The file ID
can contain from one to eight alphanumeric characters, the first of which must be
alphabetic.
The file ID is required.
Partial File Names A partial file name contains at least the file ID, but does not contain all the file-name
parts. When you specify a partial file name, the operating system or other process fills
in the missing file-name parts by using your current default values. Following are the
optional file-name parts and their default values:
File-Name Part Default
node (system) Node (system) on which your program is executing
volume Current default volume
subvolume Current default subvolume
Following are all the partial file names you can specify for a disk file named
\BRANCH.$DIV.DEPT.EMP:
Omitted File-Name Parts Partial File Name D-Series System C-Series System
Node (system) $div.dept.emp Yes Yes
Node (system), volume dept.emp Yes Yes
Node (system), volume,
subvolume
emp Yes Yes
Volume \branch.dept.emp Yes No
Volume, subvolume \branch.emp Yes No
Subvolume \branch.$div.emp No Yes
Node (system), subvolume $div.emp No Yes
You can change your current default values in various ways:
You can change the volume and subvolume with the VOLUME command of, for
example, the Binder, Inspect, and TACL products.
In some cases, you can specify node (system), volume, and subvolume names by
issuing TACL ASSIGN SSV commands, described later in this appendix.
Logical File Names You can use a logical file name in place of the disk file name. A logical file name is an
alternate name you specify in a TACL DEFINE or TACL ASSIGN command, described
later in this appendix.