StudyUID : UID - The UID of the study. For DICOM SOP Instances this is the value of the Study Instance UID (0020,000D) Attribute.

ObjectDescriptors : ObjectDescriptor[] - An array of ObjectDescriptor data structures listing data that applies to this study (within the enclosing patient), but that do not apply to any particular series within this study.

Series : Series[] - An array of Series data structures.