Doubleday, Dennis L. Barbacci, Mario R. Durra: A Task Description Language User’s Manual (Version 2) This document describes the use of Durra, a task-level application description language, and its associated toolset. The Durra environment supports the development of highly reconfigurable distributed ADA applications. The intended audience for this document is system managers responsible for Durra installation and Durra application developers. software engineering;technical report 1992-11-01
    https://kilthub.cmu.edu/articles/report/Durra_A_Task_Description_Language_User_s_Manual_Version_2_/6573338
10.1184/R1/6573338.v1