EIONET protected area identifier scheme Identifier scheme for protected area in countries not reporting under the Water Framework Directive (for example, when reporting Bathing Waters in Switzerland or Albania). EIONET river basin district identifier scheme Identifier scheme for river basin districts or equivalent spatial unit, reported by EIONET countries that do not report under the "Water Framework Directive - River Basin Management Plans - 2016 Spatial data" reporting obligation. EIONET river basin district sub-unit identifier scheme Identifier scheme for river basin district sub-units or equivalent spatial unit, reported by EIONET countries that do not report under the "Water Framework Directive - River Basin Management Plans - 2016 Spatial data" reporting obligation. WFD protected area identifier scheme Identifier scheme for protected areas under the Water Framework Directive (WFD) Article 6 and Annex IV. WFD river basin district identifier scheme Identifier scheme for river basin districts reported under the "Water Framework Directive - River Basin Management Plans - 2016 Spatial data" reporting obligation. WFD river basin district sub-unit identifier scheme Identifier scheme for river basin district sub-units reported under the "Water Framework Directive - River Basin Management Plans - 2016 Spatial data" reporting obligation.