#eif33 Use open specifications, where available, to ensure technical interoperability when establishing European public services
is a recommendation at the Semantic interoperability layer of the European Interoperability Framework.


A major obstacle to interoperability arises from legacy systems. Historically, applications and information systems in public administrations were developed in a bottom-up fashion, trying to solve domain-specific and local problems. This resulted in fragmented ICT islands which are difficult to interoperate.

Due to the size of public administration and the fragmentation of ICT solutions, the plethora of legacy systems creates an additional interoperability barrier in the technical layer.

Technical interoperability should be ensured, whenever possible, via the use of formal technical specifications.


Source: European Interoperability Framework - Promoting seamless services and data flows for European public administrations, COM(2017)134, 23 March 2017, url (Available in the languages of the EU Member States)