ISA² - Interoperability solutions for public administrations, businesses and citizens


A tool to manage and share reference codes

When is this solution for you? 

You would like to exchange data cross-border and cross-sector using reference codes. These can be used in data exchange between applications, making sure that the parties involved understand univocally the key concepts to which the data refer. They can be used to define sets of permissible values for a data field, or to provide a reference or context for the data being exchanged. Examples are enumerations, controlled vocabularies, taxonomies, thesauri or, simply, ‘lists of things’.

You would like to manage and share reference codes.

What can we offer you? 

Re3gistry provides a central access point that allows labels and descriptions for reference codes to be easily looked up by humans, or retrieved by machines. It supports organisations in managing and updating reference codes in a consistent way, so that all versions of a code remain traceable and properly documented, and do not change or disappear over time.

By using reference codes within Re3gistry, you can:

  • Avoid common errors such as entering synonyms or spelling mistakes when filling in online forms
  • Facilitate the internationalisation of user interfaces by providing multilingual labels
  • Ensure semantic interoperability when exchanging data between systems and applications
  • Make reference codes gain value when widely re-used and referenced
Our solution at a glance 

Re3gistry leaflet 

Demo illustrating the use and features of the Re3gistry

Try out the Re3gistry sandbox (EU Login identification required)

Is this solution open source? 
Any questions? 

Contact the Re3gistry team in the Joint Research Centre.

Contact the Interoperability Unit of DG Informatics (please use the subject line ‘Re3gistry’).

More detailed information 

Visit the Re3gistry page on Joinup or the Re3gistry documentation.

Visit the overview page on the JRC wiki.

Visit the ELISE action page.

Visit the INSPIRE Registry page.

Who is already using this solution? 


Chris Schubert
Austrian (CCCA) registryThe Re3gistry, as vocabulary server, is needed to make code list and their content open available. The important task of a registry is to provide persistent identifier. Keep the versions and time stamps, as kind as provenance information is essential. Provide a structure of a controlled vocabulary, as a value, has a mandatory definition and a label is not negligible."

Chris Schubert, Head of CCCA, Data Centre GEO Coordinator for Austria, Climate Change Centre Austria

Other users:

Key facts and figures 

The Re3gistry software, the underlying system behind the INSPIRE registry service, is currently handling 10 registries with more than 7000 reference codes in 23 languages and served in 7 different formats.