Interposer device type - manufacturer independent.
An 'xcmHrDeviceInterposer' device is an input device which
physically resides downstream of the print engine amongst
finishing modules.
An 'xcmHrDeviceInterposer' device with
'xcmHrDevInfoRealization' of 'physical' is a 'real' input
device (eg, a 'high-capacity Interposing feeder' that
physically resides amongst finishing modules
on a high-end printer).
An 'xcmHrDeviceInterposer' device with
'xcmHrDevInfoRealization' of 'logical' is a 'virtual'
input device (eg, a 'personality' of a
'high-capacity Interposing feeder' that physically resides
amongst finishing modules on a high-end printer).
Interposers are essentially feeders that are placed
downstream of the print engine paper path and upstream of
finishing devices. Interposer fed media is not marked by the
print engine; instead media fed from an interposer is inserted
before, between or after marked pages. The media constitutes
covers, separators etc.