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: 20/08/2026

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

31/08/2026

Virtual event

Peer learning session #5: Data exchange

Join this peer learning session to learn about the GovWay and EMREX solutions and how they facilitate efficient and secure data exchange between public administrations.

CollaborationStandardisationEuropean Policies

Last update: 06/05/2026

Peer learning session on Interoperability Test Bed and Tchap

Discover the highlights from the first peer learning session “Interoperability testing and securing instant communication” showcasing the Interoperability Test Bed for automated conformance testing and Tchap for secure messaging in public administrations.

Digital governmentOpen Source SoftwareReusable Software Components

Last update: 21/04/2026

Stakeholder engagement on Cyber Resilience Act implementation

European standardisation bodies are hosting a series of webinars and workshops to support the implementation of the Cyber Resilience Act helping small businesses and experts understand harmonised standards for regulatory compliance.

Digital governmentDigital innovationReusable Software Components

LATEST NEWS

Last update: 07/08/2026

Enhanced solution reuse tracking and high-potential solutions show

This update introduces a consolidated reuse form for reporting solution implementation and a dedicated section showcasing curated high-potential solutions within the EU Interoperability Solutions Catalogue.

Interoperable Europe policyReusable Software Components

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