Contents 1 Introduction 2 2 Aspect Oriented Programming 3 2.1 Separation of Concerns . . . . . . . . . . . . . . . . . . . . . . . . 3 2.2 Cross-cutting Concerns . . . . . . . . . . . . . . . . . . . . . . . . 4 2.3 Some Concerns Regarding AOP . . . . . . . . . . . . . . . . . . . 5 3 Feature Interactions 7 3.1 Feature Interactions in Telephony . . . . . . . . . . . . . . . . . . 7 3.2 Feature Interactions Beyond Telephony . . . . . . . . . . . . . . 14 3.3 Handling Feature Interactions . . . . . . . . . . . . . . . . . . . . 15 4 Aspects and Interactions 18 1 Introduction Aspect Oriented Programming is an emerging technology which provides practical support for Separation of Concerns in software development. Undesirable interactions between di#erent concerns or aspects are an emerging research area. Such problems may be solvable using solutions developed for dealing with feature interactions in the telephony domain. A link was demonstrated between aspect interactions and feature in