FIWARE回顾SCCON 2026：互操作性是智慧城市数据平台的基础设施

The word that was missing in Berlin

Over three days at the 2026 edition of the Smart Country Convention (SCCON26) in Berlin, more than 600 exhibitors showed what digital government, smart cities and resilient regions can look like. Two words were on almost every stand: “platform” and “sovereign”.

One word appeared far less often: interoperable. Yet it decides whether a city’s investment can be reused in the next town, connected to the next system, or moved to the next provider. Some of the most practical sessions this year showed exactly that. Aalen and Heidenheim run one urban data platform for two municipalities, with car park monitoring, depot management and a climate data hub. The five pioneer municipalities of “Smart Cities: 5 für Südwestfalen” share a regional data platform. Both run on open-source components from the FIWARE ecosystem and the NGSI-LD standard.

That isn’t a coincidence. It’s what happens when cities build on open standards instead of products.

NGSI-LD: one language for the live state of a city

A city doesn’t need one more data silo. It needs its sensors, specialist applications and digital twins to describe the world in the same way. That is what NGSI-LD does. NGSI-LD is a Group Specification of ETSI’s Context Information Management (ISG CIM) group, now at version 1.9.1 (July 2025). It describes the city as entities (a car park, a bus, a street light, a river gauge), their properties (occupancy, position, water level) and the relationships between them. It’s built on JSON-LD, so every attribute links to a shared meaning instead of a vendor-specific field name.

Three things make it fit for public infrastructure:

- Time and space are built in. Temporal queries answer “what happened at this crossing last winter?” Geo-queries answer “which sensors lie inside this flood zone?”, using one API.
- It scales from one broker to a federation. The standard covers centralised, distributed and federated architectures. A district, a city and a region can each keep their own data and still answer one query together.
- It’s an open standard, not a product. Several independent context brokers implement it, from FIWARE’s Orion-LD to other open-source and commercial implementations. The European Commission listed the FIWARE-based Context Broker as a CEF building block for exactly this reason.

Smart Data Models: agreeing on what a “parking spot” is

A standard API is only half of interoperability. If one city calls it freeSpaces and the next availableSlots, every dashboard still has to be rebuilt. The Smart Data Models programme solves the other half: shared, open data models that anyone can use.

- Led jointly by FIWARE Foundation, TM Forum, IUDX and Open & Agile Smart Cities (OASC). No single vendor owns the vocabulary.
- 1,118 official models in 82 subjects across 13 domains, from Smart Energy, Smart Cities and Smart Water to Environment, AgriFood, Logistics, Health and Manufacturing (official list, July 2026). Around 350 more are in incubation, drafted by contributors and on their way to becoming official (incubated models).
- Built from real use cases and contributed by dozens of organisations. Existing vocabularies such as schema.org are reused rather than reinvented.
- Open-licensed and free, published with a JSON Schema, a specification and examples, plus an @context that plugs straight into NGSI-LD and other linked-data systems.

The practical effect: an app built for parking in one municipality runs on another municipality’s platform without a new integration project. That is how pilots turn into services that scale.

From standard to street: interoperability in practice

Standards only matter when they run in a town hall. Germany has had a reference for open urban data platforms since December 2017: DIN SPEC 91357, the Reference Architecture Model Open Urban Platform. At European level, OASC’s Minimal Interoperability Mechanisms (MIMs) set out the minimum cities need for accessing, interlinking, representing and exchanging data, with NGSI-LD as a reference technology for context information.

At SCCON26 this was visible on the floor, not just on slides:

- Aalen and Heidenheim share one open-source urban data platform built on FIWARE components and NGSI-LD. It already runs car park monitoring, municipal depot management and a climate data hub. In the session “Beyond the Pilot”, Aalen’s project manager Marius Traub reported on what makes such projects succeed, while HYPERTEGRITY showed how its open-source, NGSI-LD-based platform underpins them [session].
- The five pioneer municipalities of “Smart Cities: 5 für Südwestfalen” (Arnsberg, Bad Berleburg, Menden, Olpe and Soest) run a regional data platform on the same stack. Their use cases range from river-level and indoor-climate monitoring to smart parking and winter road services.
- 3D twin + urban data platform: the 3D twin makes a city visible, and the NGSI-LD platform makes it analysable, in real time. Max Rudolph (Buildplace) and Alexander Süssemilch (HYPERTEGRITY) showed how the two layers connect through open standards [session].

What these projects share is replicability. A use case built once is reused by the next municipality, because the API and the data model are the same.

Replicability is also an economic argument. In its closing talk at SCCON, the team behind the Urban Data Space Platform asked how investments in municipal data infrastructure can pay off not just technically, but economically and over the long term. In North Rhine-Westphalia, the state’s special fund for data infrastructure (NRW-Sondervermögen) was part of that conversation. Money spent on open standards keeps its value when the next town builds on it. Look beyond the brand names and the pattern holds across Germany. In June 2025 the Federal Institute for Research on Building, Urban Affairs and Spatial Development (BBSR) published a comparison of urban data platforms with Fraunhofer IESE (Urbane Datenplattformen im Vergleich). Four of the five platforms it examined in detail list FIWARE NGSI-LD as a supported IoT standard: CIVITAS/CORE, the Urban Data Space Platform, UrbanPulse and CIVORA. UrbanPulse uses FIWARE Smart Data Models as its data models.

That matters for what comes next. CIVITAS/CORE is the basis of NRW.udp, the shared urban data platform that North Rhine-Westphalia’s municipal IT providers plan to launch in January. CIVORA powers the regional data platforms presented by Schleswig-Holstein at SCCON. Different names on the stands, one common language underneath.

Why interoperability is now a legal question too

Interoperability used to be good engineering practice. European law is turning it into an obligation.

- Interoperable Europe Act. In force since April 2024. Since 12 January 2025, public administrations must run interoperability assessments when they introduce new or revised requirements for trans-European digital public services. The assessment covers legal, organisational, semantic and technical interoperability (CEPIS). Shared data models and open APIs are the semantic and technical answer.
- EU Data Act. Cloud switching rules have applied since 12 September 2025. Providers must offer open, well-documented interfaces and export in structured, machine-readable formats. From 12 January 2027, switching and data-egress charges must be eliminated (Cooley). Portability is only real if your data is in a standard format on the other side.
- Data spaces. The next step after “where is my data hosted?” is “who may use it, for what, under which conditions?” FIWARE’s open-source Data Space Connector builds on the same NGSI-LD foundation. A city’s data platform becomes a node in a trusted data space rather than a separate project.

Sovereignty describes who controls the infrastructure. Interoperability decides whether that control is worth anything: whether data can move, be combined and be reused. Cities said it themselves in Berlin. The City of Oberhausen, presenting on North Rhine-Westphalia’s joint stand, argued that digital sovereignty has to be secured through technological freedom of choice, in-house skills and the right organisational structures. Open standards are what make that freedom of choice real.

Next: AI-native cities need interoperable data

Almost every stand at SCCON had an AI story. But AI agents are only as good as the data they can find and understand. Linked, semantically harmonised, real-time NGSI-LD data is what turns an impressive demo into a reliable public service.

That’s where the FIWARE community is heading next:

- Porto, 27 October. This year’s SCCON partner country hosts the workshop “Architecting AI-Native Smart Cities: FIWARE and Governed Intelligent Services” (AISCity) at the IEEE International Smart Cities Conference. Topics include connecting the Model Context Protocol to context brokers such as Orion-LD, with clear guardrails between AI reasoning and operational execution.
- Since AI Hackathon, Finland, 6–8 November. A FIWARE challenge track on context brokers, NGSI-LD and Smart Data Models. Individuals can apply until 31 October. Our invitation to every city, region and vendor we met in Berlin is simple: don’t just ask whether a platform is sovereign. Ask whether its data speaks NGSI-LD, whether it uses Smart Data Models, and whether the next municipality can reuse what you build. And then, join us to make it so.

Sources:

Artificial Intelligence FIWARE FIWARE Community