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)