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OP4L stands for Online Presence for Learning. Online Presence refers to temporary descriptions of users’ presence in the online world. Most instant messaging tools and social networking services allow users to post descriptions of their temporary state: custom messages, availability and willingness to chat and often visual representations known as avatars. The activity of maintaining this kind of temporary user profiles is no more than creating an image of someone’s presence in the online world, a representation how one wishes to be seen by their contacts – the person's online presence.

The objective of the OP4L project is to develop different kinds of services for the benefit of online learners based on their online presence. The services should provide learners with high-quality recommendation regarding the learning activities to be taken, the learning content to be used, and/or who can be contacted for collaboration and/or help provision. All the recommendations should be based on the learner’s current learning context and the state of online presence of members of his/her social graph (i.e., network of online connections).