The document discusses the ENGAGE metadata architecture for open government data (OGD). It proposes a three-layer metadata model using the CERIF standard to provide richer contextual metadata than typical OGD standards. The model includes discovery metadata mapped to common standards, contextual metadata using CERIF to represent semantics, and detailed subject metadata. This allows generating different metadata formats from CERIF while maintaining structured querying capabilities and enabling semantic web representations through linked open data. The metadata architecture is part of ENGAGE's overall data infrastructure that aims to go beyond existing open data sites in metadata quality, dataset diversity and user services.