The dataset includes over a million authority records, specifically name, subject and title authority records. In other words, it includes records representing e.g. persons and organizations who have published but also records representing topics or places.

The dataset includes over 1.9 million bibliographic records representing articles from selected newspapers and journals and from proceedings papers published in the Czech Republic. Over 40 institutions provide their records.

The dataset includes authority records representing chronological terms. These terms are used in bibliographic records to ensure data consistency. The dataset consists of over 500 records.

The dataset includes subject categories used for describing library collections. It contains 624 categories (records).

The dataset includes authority records representing institutions and meetings which have a clearly defined link to publications. It contains over 166,000 records, with about 3,000 being added each year.

Dataset includes more than 1 180 000 bibliographic records of documents published in the Czech Republic. It also contains bibliographic records of publications published abroad by Czech authors or written in the Czech language or being about the Czech Republic.

The dataset includes authority records representing genre/form terms used to consistently describe these formal characteristics of documents. It contains approx. 2,400 records.

The dataset includes authority records representing geographic names. It includes approx. 35,000 records.

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 three million bibliographic records describing materials held by the National Library of the Czech Republic. So far about one fifth of the National Library’s holdings are represented. All new books acquired since 1995 are included and older records are continuously being added. Most Czech titles published during the 20th century are part of the dataset.

The dataset contains over 600,000 records representing documents with Slavic themes held by the Slavonic Library.

The dataset includes authority records representing persons involved in the publishing process, i.e., creators themselves or people who are discussed in the publications. It contains authority records describing people (current and past), dynasties, families or mythological and fictitious characters. The dataset is continuously being enriched and updated and contains over 855,000 records, with approx. 30,000 new records being added each year.

The dataset includes authority records representing topical terms which describe abstract concepts, scientific and artistic disciplines, objects and specific entities for events which cannot be considered corporate authorities. The dataset contains over 40,000 records.

The dataset includes authority records representing uniform titles and author/name headings. They are used to link records describing a work which exists in various forms and is known under more titles or to help differentiate among works sharing the same main title.

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.).