Library of components and building blocks

This page contains the collection of technical and semantic common components and candidate Building Blocks that are relevant for eGovernment interoperability in general and digital-by-default procedures and the Once-only Principle in particular. The classification of this library follows the DE4A Reference Architecture, starting on the highest level of architecture components: the Application collaborations. These Application collaborations are aggregations of Application components, Data objects and Interfaces. You will find on each Application component pages a list of relevant DE4A common components, candidate Building Blocks (e.g. CEF) and memberstate solutions that jointly or alternatively realize that Application component.

Application collaborations

• eProcedure Portal
• Information Desk
• Evidence Interchange Management
• Trust Architecture
• Data Logistics
• Evidence Portal
• Evidence Retrieval
• Authority Agent
• User Agent
• Cross-border Subscriptions
• EProcedure Back-office

Building blocks (BB) assessment

The reference architecture description on conceptional/functional level is brought together with a catalogue of candidate building blocks mapped to required Application Services that they are intended to deliver in the context of each pilot. Gaps are identified that need common components and semantic solutions to be developed by WP5 and WP3 respectively.

The BB assessment takes place in two phases:

1. In the first phase, as part of the PSA 1st iteration, the approach assessment of the BBs was elaborated and a quick scan was performed.
2. In the second phase, after the Pilot's implementation and usage of some of the BBs, the assessment will be continued.