Description: Returns the current value of an object in the job-info sub-tree whose value has changed. Define the object identifier for the object whose value has changed as job-info.required-field.optional-field.job-id. job-info represents the OID prefix of all objects in the job-info sub-tree. Required-field represents the OID field value that follows the job-info prefix. Since some objects in the job-info sub-tree have two OID fields between the job-info prefix and the job-id, the optional-field represents the OID field between the required-field and the job-id field, if present. Using this definition, the format for the JOB-INFO-CHANGE-ID binary value can be described as follows: Bytes 0-3 : required-field Bytes 4-7 : optional-field, or all zeros if there is no optional field Bytes 8-11: Job ID. Bytes 12-n : The value of the object job-info. required-field.optional-field.job-id. All multi-byte values stored in Motorola (big-endian) format, where the most significant byte occurs first. Additional information: LaserJet 8100 will use this object to report changes to the job-info-pages-printed and job-info-state objects. The required-field (bytes 0 through 3) will designate whether the change to be reported involves the pages printed (13) or job state (15). The optional-field (bytes 4 through 7) will always be zeroes. The value-field (bytes 12 through 15) will contain the new value for pages printed or job state cast to a 32-bit integer. Note: It is possible that traps generated by this object have the same value. This is caused by the architecture of LaserJet 8100. In the LaserJet 8100 System, it is highly probable that the object value will change so rapidly that when the trap is processed, PML will read the same value twice. This is timing related and will generally be seen at the end of a job.