The data set contains data on almost 8,000 institutions that cooperate or have cooperated in building CEZL/CASLIN union catalogs, participate in interlibrary services, are in contact with the Library Institute of the National Library of the Czech Republic or are registered in the Ministry of Culture of the Czech Republic.
The dataset includes over eight million records representing holdings of over 500 Czech libraries and other collaborating institutions. It consists of records describing Czech and foreign monographs, special materials and serials (journals, proceedings etc.).