While DNA is a concept from biology, the 17 contributors to the book make the case that for a project like Schiphol to be a design success, it must be based on a simple and flexible set of rules, its ''DNA.'' An eloquent group of architects, urban planners, philosophers and designers investigate the DNA metaphor in a particularly rich set of texts, and Dutch architect Jan Benthem - who has been designing for Schiphol since the 1960s - offers an epilogue. First in a new series from the Podium voor Archtectur.