Advanced Decision Systems: description of the CODEX system as used for MUC-3

ADS has been developing an approach to text processing, called CODEX, COntext directed Data EXtraction), that couples a concept-based, probabilistic keyword pattern matcher, called RUBRIC, with a probabilistic, gen eralized graph composition chart parser, called CAUCUS . We configure these two key technologies together for a variety of natural language sorting and gisting applications to provide greater depth of analysis (higher precision) tha n keyword-based techniques alone, as well as higher throughput and greater breadth of coverage than parsing technique s alone .