<blockquote>- Maybe Rocael could explain what systems he knows could be >integrated to .LRN and what the exact use case would be (I >quickly read up on IMS at the JISC >(
http://www.jiscinfonet.ac.uk/Resources/external-resources/enterprisebrief.pdf/view) >but I assume there is more to it than exchanging registration >information between the student enrollment office and .LRN).
</blockquote>
Well, in the case of what has already been implemented (IMS Enterprise), it allow to integrate to any system that could create this XML document to create users, classes (or whatever you want them to name) and the relations among them, with different types of users.
So the legacy system might the univerities administrative system or a HR system at a corporation or whatever. I think IMS has done a good job on doing standards for packaging and intercommunication, which most of the times has nothing to do with learning process ....