Separation of concerns is an interesting design concept which is more or less addressed in various paradigms objects, aspects, components and, services in order to achieve software reusability and adaptability. Composition of these concerns is a key issue in software development.

The goal of the workshop is to bring the researchers to discuss on software composition according the paradigm which is used, the degree of dynamicity, the stage in the software life cycle, the application domain and the software variability. More generally, the unique contribution of this workshop is to view composition as it is impacted by several points of variation associated for example to the context of reuse, the time of composition or the business domain.

Composition can be applied in particular on Objects, Aspects, SOA, Component-Based architectures and may address various phases of the development process such as: GUI, design, programming, deployment, and maintenance. We have been particularly interested in having contributions dealing with any combination of a topic taken in "Composition and paradig " and "Composition and product line" in order to get a view of the composition process colored with variability issues.

We had eleven submissions and the program committee selected only seven of them on the basis of novelty, relevance to the AOSD community, and adequacy to workshop objective. According to the papers which had been selected the workshop will address in particular the following topics:

 Dynamic (re) configuration, adaptation and composition,  Language features for composition and Software Product Lines.

The proceedings are printed as an internal report of the I3S Laboratory 1 and will be included as the Vol-564 on CEUR-WS.org. They may be reached at http://CEUR-WS.org/Vol-564/.

On behalf of the organizing committee

1 Internal reports may be reached at the URL : http://www.i3s.unice.fr/I3S/

Stefan Van Baelen, Department of Computer Science of the K.U. Leuven, Belgium, (Stefan.VanBaelen@cs.kuleuven.be)  Jon Whittle, Department of Computing, Lancaster University, united Kingdom, (whittle@comp.lancs.ac.uk) Geri Georg, Colorado State University, U.S.A., (georg@CS.ColoState.EDU)  Philippe Lahire, I3S laboratory CNRS/University of Nice Sophia Antipolis, France, (Philippe.Lahire@unice.fr)  Naouel Moha, IRISA laboratory CNRS/University of Rennes, France, (moha@irisa.fr )  Mourad Oussalah, LINA laboratory CNRS/University of Nantes, France, (mourad.oussalah@univ-nantes.fr) (alphabetical order)  Olivier Barais (IRISA -Univ. of Rennes, France)  Djamel Benslimane (LIRIS -Univ. of Lyon, France)  Christophe Dony (LIRMM -Univ. of Montpellier, France )  Betty Cheng (Michigan State University , USA)  Geri Georg (Colorado State University, USA)  Program Committee  Jeff Gray (Univ. of Alabama at Birmingham , USA)

 Oystein Haugen (SINTEF, Norway)  Patrick Heymans (FUNDP Namur, Belgium)  Joerg Kienzle ( McGill University, Canada)  Gunter Kniesel (Univ. of Bonn, Germany)  Philippe Lahire (I3S -Univ. of Nice Sophia Antipolis, France)  Naouel Moha (IRISA -Univ. of Rennes, France)  Manuel Oriol (Univ. of York, United Kingdom)  Markku Sakkinen (Univ of Jyväskylä, Finland)  Lionel Seinturier (LIFL -Univ. of Lille, France)  Stefan Van Baelen (K.U Leuven, Belgium)  Gilles Vanwormhoudt (LIFL -Univ. of Lille, France)  Jon Whittle (Lancaster University, united Kingdom)

A Dynamic Software Product-Line Approach using Aspect Models at Runtime RalfTom Dinkelaker KarinMitschke MiraFetzer Mezini Dynamic composition with package templates  FredrikSørensen EyvindWAxelsen SteinKrogdahl ReCycle: Resolving Cyclic Dependencies in Dynamically Reconfigurable Aspect Oriented Middleware PaulBholanathsingh Surajbali GeoffGrace Coulson Supporting Variability with Late Semantic Adaptations of Domain-Specific Modeling Languages MartinTom Dinkelaker MiraMonperrus Mezini A Case for Custom, Composable Composition Operators  ; WilkeHavinga ChristophBockisch LodewijkBergmans Generic IDE Support for Dispatch-Based Composition ChristophBockisch AndreasSewe Aspect-Based Variability Model for Cross-Organizational Features in Service Networks Bert Stefan Walraven EddyLagaisse WouterTruyen Joosen