The concept of openness mainly relates to data, specifications and software. Open government data (here simply referred ‘open data’) refers to the idea that all public data should be freely available for use and reuse by others, unless restrictions apply e.g. for protection of personal data, confidentiality, or intellectual property rights. (Voor aanbevelingen, relaties met wetgeving, en best-practices zie https://interoperable-europe.ec.europa.eu/collection/nifo-national-interoperability-framework-observatory/solution/european-interoperability-framework-eif-toolbox/underlying-principles )