Underlying Principle 4: Reusability
Interfaces, standards), information and data, is an enabler of interoperability and
improves quality because it extends 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. Some EU standards and specifications also
exist in the DIFs and should be applied more widely. For example, the INSPIRE Directive sets out interoperability
standards for addresses, cadastres, roads and many other data topics of relevance to many public administrations.
These existing standards and specifications can and should be used more widely beyond the domain for which they
were originally developed.