Reusable Software Components

Featured content

Last update: 09/01/2026

Core Vocabularies

Reusable data models for public administrations such as Person or Business. They facilitate system integration, data publishing, and design of new systems. It is an EC solution.

Standardisation

Last update: 07/05/2026

DCAT Application Profile for data portals in Europe

DCAT-AP is a specification for metadata records, enhancing semantic interoperability across European data portals. Based on W3C's DCAT, it supports standardised dataset descriptions, enabling efficient data exchange and reuse. It is an EC solution.

Standardisation

Last update: 24/04/2024

EU Digital Identity Wallet

The European Digital Idenity Framework harmonizes authentication to digital services and enables sharing relevant identity data for citizens and businesses.

SemanticsOpen Source Software+2 topics

Last update: 13/02/2024

Once-Only Technical System (OOTS)

The Once-Only Technical System (OOTS) streamlines data retrieval for cross-border procedures, enhancing trust, efficiency, and data exchange among EU public administrations and citizens. It is an EC solution.

Collaboration

Last update: 04/03/2026

eDelivery

Secure, interoperable data/document exchange across borders using AS4 Access Points, promoting vendor-neutral, reliable, and scalable communication for public administrations and businesses. It is an EC solution.

Reusable Software ComponentseDelivery and eInvoicing

Last update: 13/02/2024

eID

The eID Building Block enhances cross-border digital services in the EU by enabling secure electronic identification and transactions in compliance with the eIDAS Regulation, promoting interoperability, trust, and security. It is an EC solution.

Reusable Software ComponentseIdentity and eSignature

Last update: 13/02/2024

eSignature

The DIGITAL eSignature Building Block enables electronic signatures in compliance with the eIDAS Regulation, supporting secure, cross-border digital interactions for public services, businesses, and citizens. It is an EC solution.

Reusable Software ComponentseIdentity and eSignature

Last update: 13/02/2024

eInvoicing

The eInvoicing Building Block boosts EU eInvoicing, adhering to EU standards for economic benefits. It aids public/private sectors in digital transition, offering support services for smooth adoption of eInvoicing. It is an EC solution.

Reusable Software ComponentseDelivery and eInvoicing

Last update: 16/02/2024

eTranslation

eTranslation is a machine translation tool that helps public administrations and businesses exchange information and documents across all official EU languages, Icelandic and Norwegian.

Languages and translation

Last update: 18/06/2026

Interoperable Europe Solutions

This space features digital solutions labelled as 'Interoperable Europe solutions' by the Interoperable Europe Board.

Content and knowledge management

Last update: 05/06/2026

EU Interoperability Solutions Catalogue

Main solutions for architecture, licensing, data models and specifications

Reusable Software ComponentsSemanticsStandardisation

Last update: 03/04/2025

EU Open Source Solutions Catalogue

Repository of the Open Source Software Solutions of the Public Administrations

Open Source Software

IN THE SPOTLIGHT

Last update: 03/06/2026

“Data catalogue enablers” highlights

Explore the event highlights from the fourth peer learning session “Data catalogue enablers”, which featured speakers from the Italian Digital National Data Platform and the Finnish Interoperability Platform.

CollaborationReusable Software Components

Last update: 26/06/2026

FOSSEPS Preparatory Action: Key Outcomes and Achievements

The FOSSEPS (Free and Open Source Software for European Public Services) Preparatory Action, established under the 2024 Union budget, has now reached a significant milestone.

Open Source SoftwareICT security+2 topics

Last update: 06/07/2026

Information Mediator

The Information Mediator is an Irish government Building Block that enables government applications across Europe to interact with each other, supporting the delivery of cross-border digital public services in alignment with the EU Digital Decade.

Digital governmentStandardisation+3 topics

LATEST NEWS

Last update: 25/06/2026

Digital Building Blocks support public services

The European Commission’s Digital Building Blocks provide reusable digital solutions that help public administrations and businesses deliver interoperable, secure public services across the EU.

Digital governmentReusable Software ComponentsICT

Last update: 19/06/2026

ITB v1.29.5 released

Release 1.29.5 of the Interoperability Test Bed software is now available.

ICTReusable Software Components+2 topics

Last update: 18/06/2026

New ITB MCP server for AI-powered test development

The Interoperability Test Bed launches its official MCP server for use by AI agents. The new MCP server enables test developers to effectively use AI agents to drive test development, simplify configurations, and automate operational tasks.

ICTOpen Source Software+4 topics