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International standards

International Principles

The Statement of International Principles, the purpose of which is to be a basis for international standardisation of cataloguing, replaces and expands the Paris Principles approved in 1961 following a process started in 2003 for contextualising catalogues with a view to meeting the needs of OPAC (online public access catalogue) users.

Statement of Cataloguing Principles, Paris 1961 (PDF, 27.6 KB)

Statement of International Cataloguing Principles (PDF, 101 KB)

Statement of International Cataloguing Principles (other languages)separador


International Standard Bibliographic Description.The International Standard Bibliographic Description is the main standard for the promotion of universal bibliographic control so that basic bibliographic information of all resources published in all countries is universally and quickly available.


MARC formats

Machine Readable Cataloguing. The MARC format or Machine Readable Catalogue enables information exchange, access to collective catalogues and shared cataloguing between libraries.





Conceptual models

The aim of the IFLA models is to identify the relations between a work and its author.

FRAD in Spanish (PDF, 472 KB)

FRSAD in Spanish (PDF, 1,82 MB)

FRBR in Spanish (PDF, 1.69 MB)separador

FRBR in English (PDF, 1.27 MB)separador

FRSAD (PDF, 3.26 MB)separador


Character coding standard designed to facilitate computer handling, transmission and viewing of texts in multiple languages and technical disciplines as well as classical texts in dead languages. Unicode gives a unique number for every character, irrespective of the platform, program or language.

Character set: Unicodeseparador


Listing of different metadata models enabling  information coding  to facilitate  its subsequent search and recovery.


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