CRITICAL-TIME/REAL-TIME DATABASE MANAGEMENT

This research will explore: (1) real-time Data Base Management System (RT-DBMS) high-level query language, and (2) the primitive level language interface to RT-DBMS "engines." We will focus on interface features rather than implementation issues. The goal is to provide RT-DBMS technology for mission-critical applications with hard and soft time constraints and embedded system spatial constraints. Phase I objectives: (1) identify sources of RT-DBMS application requirements; (2) identify sources of information on hardware technology to estimate architectural and performance characteristics within which an RT-DBMS must function; (3) gather data from identified sources; and (4) elaborate a research plan for identifying real-time query language (RTQL) requirements, as well as a low-level RT-DBMS engine interface language. SofTech will perform this work in conjunction with the Naval initiative for the DBMS Interface Standard Working Group (DISWG). The research will support DISWG needs and promote language standards. In Phase II, we will perform research to extract an RT-DBMS language and engine interface requirements, develop these requirements into language and interface specifications, and verify these developments by demonstrating their use for selected applications. Phase III will translate RT-DBMS queries into the engine interface language, preserving the temporal and spatial constraints expressed in the queries.