Catalogues are a component of the European Interoperability Framework its Conceptual model for integrated public services provision.

Catalogues help others to find reusable resources (e.g. services, data, software, data models). Various types of catalogue exist, e.g. directories of services, libraries of software components, open data portals, registries of base registries, metadata catalogues, catalogues of standards, specifications and guidelines. Commonly agreed descriptions of the services, data, registries and interoperable solutions published in catalogues are needed to enable interoperability between catalogues.1

A specific kind of catalogue is the European interoperability cartography (EIC) of interoperability solutions available for reuse and sharing.

There is a recommendation regarding catalogues:

The European Interoperability Reference Architecture Key Sharing and Reuse Enablers lists these catalogues:

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)