What is NORA?
NORA stands for Nederlandse Overheid Referentie Architecture (Dutch Government Reference Architecture). It is a national reference architecture that provides direction for the digital organisation of government bodies, so that they can collaborate, exchange data and deliver services efficiently and reliably.
NORA provides the common framework in which all government architectures (such as GEMMA, WILMA, MARIJ) come together.
🧠 Aim of NORA
- Create coherence between government domains, services and systems
- Encourage reuse of solutions and standards
- Translate policy goals and legislation into technical and organisational requirements
- Promote interoperability between organisations, chains and systems
🧱 Structure of NORA
NORA consists of various layers and building blocks:
| Architectural layer | Content |
|---|---|
| Principles | Universal foundations such as “demand-driven”, “secure”, “reusable” |
| Models | Concept frameworks, architectural models, reference models |
| Building blocks | Reusable components: authentication, logging, data services |
| Applications | Translation into domains such as healthcare, municipalities, water authorities |
🔁 Relationship to other architectures
| Architecture | Description |
|---|---|
| GEMMA | Municipal interpretation of NORA |
| WILMA | Water authorities’ variant based on NORA |
| MARIJ | Central government’s interpretation of NORA |
| PETRA | Provincial variant of NORA |
NORA forms the parent architecture — sector- and domain-specific architectures build on it.
🔐 NORA and information security
NORA supports information security through, among other things:
- Linkage with the BIO (Baseline Informatiebeveiliging Overheid)
- Support for Security by Design
- Structure for the application of standards such as ZTC, Digikoppeling, PKIoverheid
NORA explicitly sets out how public services can be offered safely, reliably and lawfully.
🏭 NORA and OT (Operational Technology)
Although NORA is primarily aimed at IT within government, the link with OT is gaining ground. Examples include:
- Smart City applications (traffic lights, sensors, cameras)
- Water management with embedded systems and SCADA integration
- Linking OT data to municipal IT platforms or data lakes
| Challenge | NORA support |
|---|---|
| OT security | The BIO is applicable to OT, plus architectural principles such as ‘secure by design’ |
| IT-OT interoperability | Description of interfaces, data flows and responsibilities |
| Uniform use of data | Use of GEMMA/NORA information models in OT/IoT contexts |
📌 In summary
NORA is the backbone of digital cooperation within the Dutch government. By providing principles, models and building blocks, NORA makes it possible to link IT and OT responsibly, within an administrative and legal context.