The content of MARC 952$c is only shown if MARC 952$c is linked to category of authorized values "LOC". In this case the content of MARC 952$c is shown in the item data field "current library" in both OPAC and staff client. If MARC 952$c is not linked to a category of authorized values, then the content of MARC 952$c is only shown in the staff client, but not in the OPAC.