With over a million entries, http://search.records.nsw.gov.au is State Records NSW's primary dataset. The entire catalogue, as well as its search functionality, are accessible via calls to a Rails-style web API described here. The record series and items entities describe the holdings of the State Archives collection and are, in their own right, a fantastic historical resource. Those descriptions are linked to entities representing the agencies and people who made the records and the business functions and activities that informed their work. These contextual entities give a rich picture of government in New South Wales and its activities right back to the colonial period.