DEVELOPMENT OF DATABASE SYSTEM, MICRO LABOCS-II+, FOR RAILWAY TRACK MAINTENANCE MANAGEMENT

Database system, Micro LABOCS-II+, has been developed for railway track maintenance management. It is already installed and utilized in Japan Railway companies. In this paper, its design methods and main features are described. They are data model and data management, direct data access by kilometer index, description of syntax and semantics of command by meta-language, data-driven graph drawing, schematic chart drawing function of track environmental data, data processing and analysis functions. At present time, UNIX version and MS-WINDOWS version of Micro LABOCS-II+ are being developed.