The remainder of this paper is as follows: Section 2 describes recent state-of-the-art for modeling context and non-context
features and methods for managing runtime variability. Section 3 describes the basic characteristics of systems that use context features at runtime and also demand collaborative characteristics. In Section 4 we describe our approach for modeling collaborative context features as an extension of previous work, while Section 5 presents two motivating examples. Finally, in Section 6 we draw the conclusions of our work.