1 Introduction

2 Friedman equation in interacting dark matter-dark energy models
2.1 Model-independent discrimination of interacting dark energy models
2.2 Discrimination precision

3 Interactions

4 Cosmology and evolution of anisotropies
4.1 Interaction coefficients in the Friedman equation
4.2 Matter perturbations in interacting dark energy cosmologies

5 Estimation of forecast precision for surveys
5.1 Discriminating between a cosmological constant and other models
5.2 Discrimination between modified gravity and interacting quintessence models
5.3 Interpretation and comparison with other parameterizations

6 Outline