Image dictionary (imgCIF) version 1.3.2
The value of _diffrn_measurement.id must uniquely identify the set of mechanical characteristics of the device used to orient and/or position the sample used during the collection of each diffraction data set. If the value of _diffrn_measurement.id is not given, it is implicitly equal to the value of _diffrn_measurement.diffrn_id. Either _diffrn_measurement.device or _diffrn_measurement.id may be used to link to other categories. If the experimental setup admits multiple devices, then _diffrn_measurement.id is used to provide a unique link.
Mandatory item: implicit_diffrn_measurement_axis.measurement_id