EMS Manual

Compiled Filters
EMS Manual—426909-005
5-17
Constants
Considerations

The compiler converts a subsystem ID expressed in the syntax just shown to an
internal form. For a description of the internal form of a subsystem ID, see the SPI
Programming Manual.

To compare subsystem IDs, you should ordinarily use the SSID function, which
removes the version number from a subsystem ID. Comparisons with version
numbers stop working as soon as a new version of the event messages is
released. For more information, see SSID Function on page 5-42.

HP recommends that you use symbolic values rather than integers to represent
subsystems for the NonStop server; EMS for subsystem and D20 for version,
for example.
Example 1
To express the subsystem ID of subsystem 2, version 51, of the (fictional) Quirks
Corporation:
QUIRKS.2.51
Example 2
To express the subsystem ID of the HP EMS subsystem, version D20:
TANDEM.EMS.D20
File Names
The syntax for expressing a file name is:
sys-name
if present, is the name of the system (node).
vol-name
is the name of the volume.
subvol-name
if present, is the name of the subvolume. The filter compiler uses your file defaults
if you omit subvol-name.
file-name
is the file part of the file name.
[ \ sys-name . ] $ vol-name [ . subvol-name ] . file-name