The authority records of CANTIC are created following the international cataloguing principles and the specifications of the Biblioteca de Catalunya, which were approved by the CCUC. Records are encoded with MARC 21. There is also a CANTIC guide with the procedure for elaborating the authority records by the entities involved. The Bibliographic Standardization Service is responsible for providing training and support to all participants while ensuring the quality of authority records. The constant introduction of new authority records turns CANTIC into a living organism in a permanent process of transformation and change. Updating the content of the database is done monthly and is available on the website of the Biblioteca de Catalunya.