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We have a set of containers -- courses, training modules, degree programs, lectures, online Universities ....
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We have a set of base curricula entities
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This can be defined at various level of granularities. It is probably useful to optimize around a base unit that is a "blackboard full" or "screenfull"
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This base unit is aggregated into hierarchical containers
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It is itself made up of smaller objects
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There are a set of people (students, teachers, administrators) with properties
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There are relationships such as courses taken and grades gotten by students
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There are a set of Services and Tools manipulating objects
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See Advanced Distributed Learning Initiative (http://www.imsproject.org/adl)
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