How is information collected for the NRA?
The NRA is continually being updated with new or improved information that is derived from a variety of sources: • Traditionally TNA: HMC has been sent hardcopy catalogues of archival collections from record repositories and other custodians for inclusion in the NRA and this remains an important method of gathering information. Each catalogue is assigned an NRA number and checked for data, which can be added to one or more of the five online indexes, which form the main access routes into the NRA. Recently, TNA: HMC has made direct electronic links from NRA index entries to catalogues that are available online. • TNA: HMC conducts an annual survey of the records that have been received by over two hundred record repositories throughout the British Isles. The results of this survey are added to the indexes. The accessioned lists are also published in a range of digests and are available online, see Accessions to Repositories. • Information about archival collections that are found in pr
