Knowledge based design is acquired through one's exposure to a large number of projects and establishes a set of patterns regarding organizations, techniques, procedures, heuristics, priorities and preferences. Over time, designers develop a distinctive set of principles that represent their own individual methods of addressing design problems. Creative designers not only design the solutions, they also design the problems. Although their repertoire of resources includes explicit declarations regarding recognizable problem types, physical components, design rules, or evaluation methods of different aspects, design decisions are also driven by vast amounts of tacit considerations derived from professional experience. Designers make such decisions balancing design intent and technical requirements in a very efficient and synthetic manner. We designers know what we do, but it is not so clear how we do it. This conference is an invitation to engage in a dialogue concerning how Design Knowledge can be represented and manipulated within digital environments.