This paper presents some aspects of the IST project called Knowledge Practices Laboratory (KP-Lab), which aims at facilitating innovative practices of working with knowledge (knowledge practices) in education and workplaces. The project is based on the idea of trialogical learning that refers to the process where learners are collaboratively developing shared objects of activity (such as conceptual artifacts, practices, products) in systematic fashion. It is important do develop relevant flexible tools and functionalities for supporting this new innovative approach like semantic middleware with collaborative working or learning environment, etc.