http://data.europa.eu/2sa/elap/openness In the context of interoperable public services, the concept of"openness"mainly relates to data, specifications and software. Rationale This principle is based on three pillars: the openness of public administration's data, the openness of the software used and implemented and the openness of standards and specifications used to develop digital public services. Principle Source Openness Underlying Principle (2) of the European Interoperability Framework (EIF)