•The Checklist assumes a simple data model: 
–There exist distinct, identifiable pieces of digital content, or items, that can be searched for, collected, and imported for instructional purposes. 
–Items can be found by searching collections, groupings of items that can be addressed and queried through a common interface or set of services.
–Items, and possibly collections as well, have metadata associated with them, information that describes them and otherwise aids in their use and management.
Checklist Assumptions:
Data Model