  We investigate the self-organising behaviour of Digital Ecosystems, because a
primary motivation for our research is to exploit the self-organising
properties of biological ecosystems. We extended a definition for the
complexity, grounded in the biological sciences, providing a measure of the
information in an organism's genome. Next, we extended a definition for the
stability, originating from the computer sciences, based upon convergence to an
equilibrium distribution. Finally, we investigated a definition for the
diversity, relative to the selection pressures provided by the user requests.
We conclude with a summary and discussion of the achievements, including the
experimental results.
