ACTIVE aims to increase the productivity of knowledge workers in a pro-active, contextualised, yet easy and unobtrusive way. The aim is to convert tacit and unshared knowledge – the "hidden intelligence" of enterprises – into transferable, interoperable and actionable knowledge to support seamless collaboration and to enable problem solving. A key aspect will be the support for informal procedural knowledge - the informal collaboration and problem-solving tasks that drive much knowledge work in the enterprise.