The BNE offers its entire automated catalogue in compressed files created from the various bibliographic formats and authority records.

Two .rar files are included for each of the bibliographic and authority formats, one containing all bibliographic or authority records as an .xml file, and the other, with the same content, as an .mrc file (ISO 2709: format for the exchange and integration of bibliographic information in automated environments).

The content of every file is updated at the beginning of the current month.

The Catalogue data fall under the CC0 licence, which is why they are free to use and this does not require prior authorisation. However, the BNE would appreciate a mention of the records' origin.

Authorities

.mrc format		.xml format
Person		Person
Person-title		Person-title
Entity		Entity
Congress		Congress
Title		Title
Subject		Subject
Geographic		Geographic
Spanish geographic		Spanish geographic
Subject sub-headings		Subject sub-headings
Genre/form		Genre/form
Subject + Sub-heading		Subject + Sub-heading

Additions, removals and modifications
Additions and modifications of authorities in the last month in .mrc format
Additions and modifications of authorities in the last month in .xml format
Authorities removed in the last month in .txt format

Bibliographic

.mrc format		.xml format
Drawings, posters, ephemera, engravings, photographs		Drawings, posters, ephemera, engravings, photographs
Filmstrips, transparencies		Filmstrips, transparencies
Audio recordings		Audio recordings
Kit or multimedia		Kit or multimedia
Manuscripts and personal archives		Manuscripts and personal archives
Maps		Maps
Mixed materials		Mixed materials
Old monographs		Old monographs
Modern monographs		Modern monographs
Music scores		Music scores
Electronic resources		Electronic resources
Newspapers and magazines		Newspapers and magazines
Video recordings		Video recordings