The region identifies the state(s) the subject matter relates. If you are also interested in information related to the electrical links between the States select Interconnector.
The sector identifies the energy 'sector' to which the subject matter relates. Note all subject matter featured on the AER website relate to either an individual sector or both.
The segment identifies the area in the supply chain to which the subject matter relates.
The AER has categorised its projects into a variety of common workstreams. The type identifies subject matter related to those workstreams.