pds:logical_identifier
pds:version_id
pds:title
pds:information_model_version
pds:Product_Observational/pds:Observing_System<1>/pds:name<1>
pds:Product_Observational/pds:Observing_System<1>/pds:Observing_System_Component<1>/pds:name<1>
pds:type
pds:lid_reference
pds:reference_type
