This workshop focussed on the requirements for tools and environments that support business rules in an object-oriented setting and attempted to provide an overview of possible techniques and tools for the handling, de nition and checking of these rules and the constraints expressed by them during analysis, design and development of objectoriented software. 1 Workshop Goal Business rules are nothing new. They are used by every organisation to state their practices and policies. Every business application contains many business rules. One of the current problems with business rules is that code, analysis and design models specify business rules only implicitly and that current software engineering tools provide inadequate support to explicitly and automatically deal with business rules when building object-oriented business applications. With this workshop we intended to investigate which tool and environmental support for handling business rules during software development and evolutio...