  Inspired by the chemical metaphor, this paper proposes an extension of
Linda-like languages in the aim of modeling the coordination of complex
distributed systems. The new language manipulates finite sets of tuples and
distributes a density among them. This new concept adds to the non-determinism
inherent in the selection of matched tuples a non-determinism to the tell, ask
and get primitives on the consideration of different tuples. Furthermore,
thanks to de Boer and Palamidessi's notion of modular embedding, we establish
that this new language strictly increases the expressiveness of the Dense Bach
language introduced earlier and, consequently, Linda-like languages.
