XC- A language for embedded rule based systems

We report on experiences in the design of the programming language XC. It is an extension of C++ and combines abstract data types with rule based programming. Our design decisions are validated by three application prototypes and by benchmarking XC and OPS83. The experiences raise some critique on the RETE algorithm and on C++ as a host language. However, most of the results are also applicable to other host languages that support data abstraction. XC has been designed specifically to be used in embedded real-time expert systems.