It's a script which searches for data inconsistencies. The result shows the following inconsistencies in data;
items without item type or with invalid item type
bibliographic records without item type or with invalid item type
bibliographic records with invalid MARCXML
bibliographic records without biblionumber or biblioitemnumber in MARCXML
bibliographic records without title
invalid values in fields where the framework limits to an authorized value category
authority records without authority type or with invalid authority type
patrons who are too old or too young for their category