The European Interoperability Reference Architecture (EIRA) is an architecture content metamodel defining the most salient architectural building blocks (ABBs) needed to build interoperable eGovernment systems. The EIRA provides a common terminology that can be used by people working for public administrations in various architecture and system development tasks.

Source: Revised EIF

A structured basis for classifying and organising building blocks relevant to interoperability, which are used in the delivery of digital public services.

ELISE Resources: Architectures and Standards Guidelines for Spatial Data Infrastructures (SDI) and Digital Government