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This Technical Report identifies the standards, technical specifications, technical reports and guidelines, required to implement a Spatial Data Infrastructure (SDI) in Europe. It gives recommendations as to whether any of these items should become EN, and proposes a roadmap for future work items. It further provides recommendations for measures to be taken in order to support implementation and maintenance of a SDI. In so doing, the report addresses a range of topics, including: -- multi-lingual aspects, -- consistent identification of geographical items, -- conformance testing, -- geographic information metadata including catalogue service profile and guidelines, and -- WMS and WFS profiles and guidelines.