Semantische Suche in deutschen und internationalen Geodaten-Metadaten: 36 723 Indikator-, Tabellen-, Datensatz- und Variablenbeschreibungen aus 42 Datenquellen.
The search itself needs JavaScript. What the index holds, where every record comes from and how the links are verified is described on the project site: GeoLAB, with the full source list on its data sources page.