AACR 2:

Anglo-American cataloging rules/ Prepared by the American Library Association, the British Library, the Canadian Committee on Cataloguing, the Library Association, the Library of Congress; edited by Michael Gorman and Paul W. Winkler. 2nd ed. - London: Library Association; Chicago : American Library Association, 1978. 

This second edition proved superior revealing basic principles that provided the edifice of the code. It followed "the sequence of cataloguers' operations in most present-day libraries and bibliographic .agencies," i.e., first examining the item and describing it and then determining the access points. The code therefore, presented the descriptive rules in part 1 followed by rules for determining and establishing headings/access points in part 2. Part 1 begins with a general chapter which can be applied to all materials in general followed by chapters on specific media which are elaborations of the provisions of the general chapter. These rules were also based on ISBDs (the general and specific ones). In the description the code permitted alternative rules and options to suit the needs of the libraries and cataloguing agencies. In the rules for access points, it worked out many terminological improvements to remove conceptual irritants, eg, statement of responsibility in place of statement of authorship, corporate entry, instead of corporate author, etc. It standardized punctuation to conform to the pattern established in ISBDs.