The document discusses mobile personal learning environments (PLMEs) and how they can support contextual learning in the workplace. PLMEs allow learners to set their own learning goals, manage content and the learning process, and communicate with others. They integrate learning and knowledge development into work processes by linking learning to real-world contexts and enabling collaborative knowledge construction. The goal is to move from expert-developed knowledge to knowledge negotiated by learners in real time through social learning processes supported by PLMEs.