Interfaces, standards, information and data are enablers of interoperability and improve quality because they extend operational use as well as saving money and time. This makes it a major contributor to the development of a digital single market in the EU. (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 )