Information on the dataCan refer to: (1) the demographic data used in the Data Linkage process; or (2) information pertaining to services provided to people or their clinical information (available only from Data Custodians, including via CARES). collections linked via the WADLSWestern Australian Data Linkage System: The Western Australian system used to connect available health and other related information for the WA population. This incorporates database tables holding demographic data and linkage keys, and the bespoke tools used by Linkage Staff to process, create, store and retrieve them. can be found at the Downloads section.