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CKAN Domain Model

Overview

  • Datasets: the central entity in CKAN. Associated to Datasets are 'Resources' (files, APIs etc) and a large variety of metadata.
    • Core metadata: Datasets have a set of "core" metadata attributes
    • Unlimited additional metadata: Datasets may have an unlimited amount of arbitrary additional metadata in the form of "extra" key/value associations.
    • Relationships: relationships between datasets (such as depends on, child of, derived from etc)
  • Resources: the actual data or APIs associated to a dataset are entered into Resources.

Additionally:

  • Revisions: All metadata in the CKAN system is revisioned -- i.e. all changes are recorded. This support reverting changes, viewing changes, and, perhaps most importantly going forward, the exchange of metadata changesets between different CKAN instances or CKAN and other catalogues. However, this is not a core part of the schema.
  • Task Status: A key/value store used by CKAN Tasks (background processes).

Entity List

Part of the domain model but not central:

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