When all of the analysis has been done, and the studies have disclosed that it is time to implement a computer-based procedure to secure the desired objectives, several problems arise. One problem is that of building the data file which will form the basis for the new procedure. (Author)

Considers aspects of building, maintaining, and using United States MARC format and other related standards, discussing costs and benefits, MARC and the American National Standards Institute's Z39 standard, effects of MARC on content and processing, compatibility between and within standards, and MARC in practice. Nineteen sources are cited. (EJS)