Bibliography on data base structures
ACM SIGMIS Database
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The capability to interrogate COBOL describable files was added to an existing data base management system, RCA's UL/1. This paper discusses features of the implementation of UL/1 which tended to facilitate the COBOL additions and which features would have been desirable in order to simplify the extension. The authors believe that as the data base management field evolves, more extensions to the set of files handled by data management systems can be expected. The lessons learned in this implementation could well have broad applicability.