An architecture for high-level language database extensions
SIGMOD '76 Proceedings of the 1976 ACM SIGMOD international conference on Management of data
Interactive support for non-programmers: The relational and network approaches
SIGFIDET '74 Proceedings of the 1974 ACM SIGFIDET (now SIGMOD) workshop on Data description, access and control: Data models: Data-structure-set versus relational
Towards an integrated development environment
IBM Systems Journal
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UDL consists of a set of database extensions for programming languages such as COBOL and PL/I. The first description of UDL was given in [1], and detailed specifications were published in [2-6]. The present paper provides an informal introduction to the concepts and facilities of UDL as currently defined [3,4], and thus forms a replacement for the original paper [1]. UDL per se is not dependent on any particular host programming language; its constructs and functions, or some suitable subset of them, can be mapped into the concrete syntax of a variety of such languages. For definiteness, however, this paper uses one specific language, namely F1/I, as the basis for all examples.