The IATI codelists are key to making IATI activity and organisation data from different publishers comparable.
Codes are used to represent many standard values in an IATI activity. For example, codelists such as organisation type ensure that different publishers have unambiguous, comparable definitions (e.g. 23 = Regional NGO; 60 = Foundation; or 70 = Private Sector) they can use when describing activities.
Codelists are updated through a managed process. A codelist can either be core (centrally managed by IATI), non-core (this may be derived from an authority source but added to by IATI), replicated or external.
For every codelist, the codelist type of core, non-core, replicated or external is stated.
An API is also available for accessing codelists.