The software build date of the SNMP sub-agent which implements
the XCMI Service Monitoring MIB on this host system.
Usage: This object SHALL specify the BUILD date of the SNMP
sub-agent software (not available elsewhere in IETF/XCMI MIBs).
This object SHALL NOT specify the INSTALL date of the SNMP
sub-agent software on this host system, nor the RESET date.
Note: Contrast with 'hrSWInstalledDate' in the Software
Installed group of the IETF Host Resources MIB (RFC 2790), and
'xcmHrDevInfoResetDate' in the Device Info group of the XCMI
Host Resources Extensions MIB.