Source : Free On-Line Dictionary of Computing

DDL
     
        1. ["A Digital System Design Language (DDL)", J.R. Duley, IEEE
        Trans on Computers c-17(9), pp. 850-861, Sep 1968].
     
        2.  An {adventure} language developed by
        M. Urban, C. Kostanick et al of the {UCLA} Computer Club.  DDL
        was the forerunner of {ADL}.
     
        3. {Data Definition Language}.
     
        4. {Document Description Language}.
     
        5. {Dynamic Data Exchange}.  (Originally "Linking").
     
        (1997-06-05)