Source : Free On-Line Dictionary of Computing

Data Management Language
     
         (DML)
     
        1. Any language for manipulating data or files,
        e.g. {IBM}'s {Distributed Data Management} (DDM).
     
        2. An early {ALGOL}-like language with lists and graphics,
        that ran on the {Honeywell 635}.
     
        ["DML: A Data Management Language", D.W. Bray et al, GE,
        Syracuse NY].
     
        (1999-06-07)