Open Ahjo is a service for accessing decision-making materials for the City of Helsinki. The service focuses on materials related to political decision-makers such as committees, the city board, and the city council. This year, data from non-political civil servants involved in decision-making are also expected to be made available.
All accessible data is provided in zipped XML files, though the REST calls used to retrieve the data are issued in JSON. The ZIP data files also contain other types of files, usually PDFs.