Annex II of the communication is the European Interoperability Framework (EIF v2).
The EIF is a recommendation, maintained under the ISA programme, in close cooperation between the Member States and the Commission.
The EIF should be taken into account when making decisions on European public services that support the implementation of EU policy initiatives and when establishing public services that in the future may be reused as part of European public services.
Interoperability is build on 12 underlaying principles.
In particular, the "Reusability principle" (N° 10) means that public administrations must be willing to share with others their solutions, concepts, frameworks, specifications, tools and components, applying the principle of "Openness" (N° 9).
The EIF states: Reuse and sharing naturally lead to cooperation using collaborative platforms: the technical platforms to share open source software components (https://joinup.ec.europa.eu/page/osor.eu/), semantic assets (https://joinup.ec.europa.eu/page/semic.eu/) and best practices (http://www.epracice.eu/), and the legal framework (the European Union Public Licence EUPL) that the Commission has also created in order to facilitate the sharing of software components.
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