From CKAN

Domain Model v2 (Proposed)

Proposal for v2

(In Progress) - see also http://wiki.ckan.net/UX#Reduce_to_four_conceptual_enties

• Account (type = user | organization) - User or Organization. Owns things.
• Resource - a file / api / etc (or, strictly, a reference thereto)
• (New) Dataset (Collection) (= Package or PackageGroup) - collects together resources
  • Can Collection's group Collections? No.
  • Many-to-Many with Resource
• Activity. Any kind of activity info.

Changes:

• Everything (other than Account) has owner (will usually be 'creator' but owner is better can change)
• Rename Package to Dataset and make m2m with resource (now done)
• Deprecate (Package) Group