The LNCS Journal "Transactions on Aspect Oriented Software Development" t is devoted to all aspects of aspect-oriented software development (AOSD) techniques in the context of all phases of software life cycle, from requirements and design to implementation, maintenance and evolution. The focus of the journal is on approaches for systematic identification, modularization, representation and composition of crosscutting concerns, namely, aspects and evaluation of these approaches and their impact on improving the quality attributes of software systems. This book, the third in a Transaction on Aspect-Oriented Software Development series, presents six papers together with the introduction of the revised guest editor '.