IMPACT: a multi-agent framework with declarative semantics

The IMPACT project (http://www.cs.umd.edu/projects/impact) aims at developing a powerful multi-agent system platform, which (1) is able to deal with heterogenous and distributed data, (2) can be realised on top of arbitrary legacy code, (3) is built on a clear foundational basis, and (4) scales up for realistic applications. We will describe its main features and several extensions of the language that have been investigated (and partially implemented).