https://ec.europa.eu/cefdigital/wiki/display/CEFDIGITAL/All+CEF+services
To support the Digital Single Market in succeeding, the Connecting Europe Facility (CEF) program is funding a set of generic and reusable Digital Service Infrastructures (DSI), also known as building blocks. The CEF building blocks offer basic capabilities that can be reused in any European project to facilitate the delivery of digital public services across borders and sectors. Currently, there are five building blocks:
eDelivery
eDelivery is a network of nodes for digital communications. It is based on a distributed model where every participant becomes a node using standard transport protocols and security policies. eDelivery helps public administrations to exchange electronic data and documents with other public administrations, businesses and citizens, in an interoperable, secure, reliable and trusted way.
eID
The CEF eID building block is a set of services (including software, documentation, training and support) provided by the European Commission and endorsed by the Member States, which helps public administrations and private Service Providers to extend the use of their online services to citizens from other European countries. This is realised through the mutual recognition of national electronic identification (eID) schemes (including smartcards, mobile and log-in), allowing citizens of one European country to use their national eIDs to securely access online services provided in other European countries. The mutual recognition of eID schemes across Europe is mandated by the eIDAS Regulation.
eSignature
The eSignature building block helps public administrations and businesses to accelerate the creation and verification of electronic signatures. The deployment of solutions based on this building block in a Member State facilitates the mutual recognition and cross-border interoperability of e-signatures. This means that public administrations and businesses can trust and use e-signatures that are valid and structured in EU-interoperable formats.
eInvoicing
Electronic invoicing is the exchange of an electronic invoice document between a supplier and a buyer. An electronic invoice (eInvoice) is an invoice that has been issued, transmitted and received in a structured electronic format which allows for its automatic and electronic processing
eTranslation
eTranslation’s main goal is to help European and national public administrations exchange information across language barriers in the EU, by providing machine translation capabilities that will enable all Digital Service Infrastructures (DSIs) to be multilingual. Public administrations, citizens and businesses in the EU will thus be able to use digital services in the language they choose.