From 18 February 2027, the EU Battery Regulation requires a digital product passport (DPP) for electric vehicle batteries, batteries for light means of transport (such as e-bikes and e-scooters) and industrial batteries above 2 kWh. For manufacturers and their software vendors, the question is no longer whether to build one, but how to build it correctly and in a way that others can actually use.

A passport can contain all the required information and still be difficult to exchange or process automatically, because different organisations use different names, structures and interpretations for the same battery data.

To prevent this, several parties each define a part of the DPP: the European Commission and industry define generic concepts, sector organisations add battery-specific concepts, and experts translate the requirements into machine-readable rules. These parts have to fit together. Within CIRPASS-2, we developed a Battery DPP Template that shows how these contributions come together in one concrete, machine-validatable DPP, and how Semantic Treehouse turns that template into implementation support. The approach follows the semantic architecture that the European Commission describes in the DPP Registry Semantic Data Guide (v1.0, October 2026).

This showcase is written for two groups. If you are involved in DPP standardisation, it shows how the layers and the parties behind them fit together. If you are an IT architect at a manufacturer or another party that must provide a DPP, it shows how your Battery DPP can be compliant, using an EV battery as an example.

Batteries are just one example. The same approach can be applied to other product groups. Are you curious how this could work for your sector? Get in touch via Discord or mail Linda Oosterheert.

At Semantic Treehouse, we're all about shaping ideas about data and its meaning into explicit and explainable message models. These message models are the bedrock on which to build powerful and unambiguous software ecosystems, like the European Union's envisioned Digital Product Passport system!

In a previous blogpost by my colleague Wouter (ENDORSE '25, BOMOS), he talked about our vision of using Generative AI for semantic interoperability. The core idea he conveyed there, and which I will also highlight here again, is that semantic interoperability at its core is not a technical problem. It's a problem of – a lack of – human coordination. Keeping this in mind, we have asked ourselves the question: How can AI help advance or accelerate the systematic BOMOS approach to standardization? In this blog post, I'm happy to show to you the first part of our STH Co-pilot roadmap: AI-assisted message model creation!

Over the years, mappings have been a recurring topic in our conversations with our partners and communities. For example, our earliest issues and feature requests with the word "mapping" date back to 2017/2018. And our partners consistently identified support for mappings as a priority feature in all of our open roadmapping sessions.

That's why I'm very happy to share that we have reached a new milestone this month: mappings are now first-class citizens in Semantic Treehouse.

What drives our work is the idea that semantic interoperability is not fundamentally a technical problem, but a commons governance problem. As we’ve mentioned before: 'Systems not talking actually represent people not talking.' Keeping that in mind, we are asking the question: how can Generative AI help?

That was the subject I explored in my recent presentation, "Practical Experiences with BOMOS, Semantic Treehouse, and GenAI," at the ENDORSE 2025 conference in Brussels. For those who couldn't attend, I'm happy to share the full recording of the session.

Op 5 juni organiseerde TNO een Semantic Treehouse roadmapping sessie in Utrecht. Aan alle deelnemers onze hartelijke dank voor jullie aanwezigheid en waardevolle inbreng!

Terugblik​

Dit was inmiddels de derde keer dat we een dergelijke sessie organiseerden. In 2022 hielden we onze eerste gebruikersmiddag, en deze keer kwamen we weer samen bij YouMeet in Utrecht voor een middag vol inspiratie, uitwisseling en gezamenlijke roadmapping.

Het doel van deze sessie was opnieuw tweeledig. TNO wilde samen met standaardisatie-experts uit verschillende sectoren:

1. Kennis en ervaringen delen over trends en ontwikkelingen op het gebied van digitalisering en interoperabiliteit
2. Samen de toekomstige ontwikkelroadmap van Semantic Treehouse vormgeven en prioriteren

In a discussion about the possible role of AI to solve problems of interoperability, a colleague recently observed: "Semantic specifications are just expressions of human coordination." (Perhaps you can guess his stance on the potential of AI.) These words reminded me of a former client who I think once captured the same principle from a different angle by saying: "Systems not talking represents people not talking." These observations point at what to me is the core of standardization work: that the real challenge with interoperability is the human coordination it requires. Sometimes our conversations about interoperability focus a little too much on the technology, while it is the coordination that make all these technical specifications valuable.

For many organizations in the Dutch standardization community, the BOMOS (Management and Development Model for Open Standards) provides the framework for this coordination. BOMOS guides the creation and maintenance of high-quality, open standards through structured processes covering strategy, tactics, operations, implementation support, and communication.

This post clarifies how Semantic Treehouse serves as a practical, digital environment equipped with features specifically designed to support these BOMOS activities. Our platform was born from the need to execute these very processes more effectively, and this connection remains core to our identity, even as we serve broader roles like being a Vocabulary Hub in European Data Spaces.

The call for a more transparent and sustainable economy is loud and clear. We want to know where products come from, what they are made of, and how we can responsibly reuse them. Digital Product Passports (DPPs) are essential for this: they give each product its own passport detailing its lifecycle. The European Union is strongly committed to DPPs to encourage more sustainable choices. However, practical implementation is challenging and complex. Products travel the globe, through supply chains with numerous actors and diverse IT systems. How do we ensure that the data in a DPP in Spain is as usable and understandable as it is in the Netherlands or Vietnam? We need a "common language", a standard that ensures everyone interprets the same information in the same way. Without such a language, a DPP is like a product instruction manual in a language you don't speak. You see the words, but the instructions are lost on you.

The need for practical implementations of DPPs is precisely what we are addressing within our work, and we are addressing it from multiple perspectives. For instance, we have established a DPP Semantic Treehouse environment – https://dpp.vocabulary-hub.eu/ – which serves as the hub where the 'common language' for all product types can be hosted, managed, and shared. Beyond this environment, we are actively engaged in various projects, developing features to simplify the process of creating DPPs. But how does that work? Let's dive into it!

In this video we explain the work done on the Paperless Bulk Transport use case. This explainer video is created as part of the Living Labs of the Centre of Excellence for Data Sharing and Cloud (CoE-DSC).

JSON Validator​

We’re excited to share that our new JSON validator is ready to use! This new validator helps you validate your JSON messages against the agreed schemas in your ecosystem.

With more and more ecosystems relying on JSON to share data, it became essential for us to have a JSON validator in addition to our XML validator. So, we teamed up with a group of students from the University of Groningen, and together we created a first version of this validator.

About our workshop​

From September 17-19, 2024, we attended the SEMANTICS-2024 conference in Amsterdam, where we delivered a half-day tutorial about semantics in data spaces.

The workshop provided a practical perspective on the role of semantics in data spaces, based on the current challenges we face in practice. We talked about:

• Data spaces and the role of a vocabulary hub,
• How to established semantic interoperability in a data sharing community setting,
• How the bridge the gap between the two paradigms for interoperability: Linked Data based interoperability and (EDI) message based interoperability.