One of the outcomes of the conference on personal learning environments last week in Edinburgh was this PLE Reference Model. I like the way they map various usage scenarios, and the entity diagram (slide 19) is a thing of beauty. Still. Does it map into the e-learning framework (or whatever it's called this week) as suggested? Doeds the flow diagram (slide 25) capture what the PLE is really supposed to be? I feel a tension between what the PLE ought to be and the constraints being imposed on the design from the outset. But that could be nothing more than an artifact of my own perception - I wish I had more to work with than the slides.