Enhancements to the DBTG Model for Computer-Aided Ship Design.
Research and development rept.,
DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD
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Computer-aided ship design CASD presents unusual requirements for data management multiple views and working files must be described and processed. The CODASYL Data Base Task Group DBTG approach to data management is described and then evaluated in terms of CASD. Enhancements are recommended, including a capability for describing new special-purpose sets in a sub-schema, a capability for specifying a subset of a hierarchical structure as part of a users view in a sub-schema, and a capability for defining procedures in the sub-schema to allow the user to conveniently follow a linear path through a complex structures. Author
- Marine Engineering