Lookup table of Horizon item and borrower codes. The source of this data are the code definition tables in Horizon, such as bstat, btype, collection, and itype.

This dataset is useful for understanding the codes used in some of Seattle Public Library's other open datasets. These codes (namely "ItemType" and "ItemCollection") are systematically used in the cataloging of items within Integrated Library System (ILS), Horizon (Sirsidynix).