A system object reference (which SHALL include an object instance qualifier suffix), used to specify an object in another table related to this supply. Usage: If the supply also appears in the prtMarkerSuppliesTable, then this referenceOID SHALL be the OID for the prtMarkerSuppliesDescription for this supply. Usage: If the supply also appears in the finSupplyTable, then this referenceOID SHALL be the OID for the finSupplyDescription for this supply. Usage: If the supply also appears in some other table (such as a scanner supplies table), then this referenceOID SHALL be the OID for the description column for this supply if a description column exists. Otherwise it SHALL be the first column of the other table as the reference OID. Usage: If the supply does not appear in any other table, then this referenceOID SHALL be the OID for hrDeviceDescr for the physical device requiring or using this supply. Usage: If no physical device in the hrDeviceTable requires the supply, then the hrDeviceTable is not complete. Note: Given the flexibility this object provides, the information is only valuable to the Management Station if the OID is a well-known OID. Note: This object has no default value since it must be filled in.