The DL/I commands constitute the run-time database interface for an application. Collectively, the DL/I commands are a procedural language for data access, data retrieval, and data manipulation. They are implemented as a set of subroutine calls or preprocessed commands with various parameters. An application requests desired database operations by embedding the appropriate calls at specific points in the source code. Separate DL/I compilers are provided for a number of application programming languages.
The DL/I commands are both navigation- and access-path-oriented.
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