Pieter Colpaert
@pietercolpaert
Professor #interoperability and #knowledgegraphs at #Ghent University Building Linked Data Event Streams #ldes Personal website: Team website:
In times of rapid change we need organizations like Open Knowledge Belgium to stress the importance of openness. We’re looking for new volunteers to join the board. Treasurer, secretary, project funding, IT person, advocacy… there’s plenty to help with. Interested? Let me know! openknowledge.be
Om nog maar te zwijgen van de regels met 3 kinderen over wat ik wel en niet kan aftrekken van de belastingen. De default form heeft te weinig rijen dus ik moet zelf een hele sheet aanmaken.
September promises to be a very busy #Trustflows events month! * 14th: #TrustTriggers 2 * 15-17: @semantics-conf.bsky.social * 18th: @athumi.bsky.social ’s Belgian Data Spaces day in Brussels More info and registration at trustflows.eu
Since 2008, irail.be exists as an API and webapp for building the best mobility experience possible. Want to help building the slickest possible Web UI for planning trains? There’s now a new github repo for that that only contains the client-side parts: github.com/iRail/irail.be
I wrote something in which I show how RDF, SHACL, OWL, SKOS and N3 can support automated Linked Data alignments and eventual interoperability, all in the browser using my recently published rdfjs-inference-engine npm library 🚀 pietercolpaert.be/linkeddata/2...
What makes data trustworthy enough for people or their agents to act on it? I wrote about Linked Data based “trust triggers” that can give systems good reasons to act. pietercolpaert.be/interoperabi...
Missed the first #TrustTriggers event? We’re organizing the second one the 14th of September, one day before the @semantics-conf.bsky.social Conference. Slides of the first edition available here: trustflows.eu/events/2026/...
1 week before the #trusttriggers event we’re organizing at De Krook in Ghent next week: we’ll dive into EU-wide digital identity through 3 use cases: water quality, digital product passports, and local council decisions. Registrations: trustflows.eu/events/2026/...
The #Trustflows community launches #TrustTriggers: events combining a cross-domain Trustflows topic, networking, and 3 concrete use cases. First edition: 20 April at De Krook, Ghent. Program and registration at trustflows.eu/events/2026/...
Call for papers alert! The 4th Semantics in Dataspaces organized together with the European Semantic Web Conference (ESWC) welcomes contributions trying to solve one of our W3C Community Group’s challenges! dbis.rwth-aachen.de/SDS26/ #semantics #knowledgegraphs #dataspaces
Next Monday we’re organizing the closing event of the SolidLab research project in De Krook - Ghent, where we’ll launch our next steps with the #Trustflows community. Registration and program: solidcommunity.be/events/solid... The charter of the new community: trustflows.eu/charter
There’s a tension between being semantically rich, and being semantically aligned. Eventual #interoperability is a new term I propose to indicate that you can do one after the other pietercolpaert.be/interoperabi...
On my way to the network of interoperability event of Digital Flanders
Want to follow a course in #Interoperability, #LinkedData and #KnowledgeGraphs in Ghent? In February 2026, we relaunch our course on Knowledge Graphs, open to both master’s students and made available as micro-credential to professionals. Enrol here: www.ugain.ugent.be/MCKG2026.htm
Next week we’re hosting the second in-person #LDES workshop at #SEMIC2025. Piotr Sowiński will be the keynote speaker. He developed Jelly, a binary RDF format for syncing RDF datasets at speeds we can only aspire to. What is his opinion about the work we’re doing? What can we learn from eachother?
Oh boy it’s time (again)! My long awaited Pebble arrived! Quite a remarkable story for a product, that’s now an open source and open hardware project. Follow @ericmigi.com on the topic!
Toch bizar hoe na al die jaren er amper innovatie is geweest in weerstations voor thuis, en hoe die dingen er verdorie lelijk blijven uitzien. Iemand een suggestie die er mooier uitziet, liefst met open data/open source/open hardware?
Ieben Smessaert and Julián Rojas will demo SPARQL time functions — treating partial & floating dates as intervals for better temporal queries. Implemented in Comunica. 🔗 smessie.github.io/Article-ISWC... #ISWC2025
Julián Rojas presents our #Trustflows model: combining CQRS + Event Sourcing with Linked Data to decouple reads/writes and add trust contexts. Validated in the PACSOI health use case. 🔗 ceur-ws.org/Vol-4085/pap... #ISWC2025
Julián Rojas, Arthur Vercruysse and Ieben Smessaert lead the RDF-Connect tutorial — building provenance-aware, multilingual streaming pipelines. Let’s create a weather KG for Nara 🇯🇵! 🔗 rdf-connect.github.io/Tutorial-ISW... #ISWC2025
Jonni Hanski and Ruben Taelman explore automated client-side federation for Wikidata after its graph split. Shows when automation can replace manual SERVICE clauses. 🔗 www.rubensworks.net/raw/publicat... #ISWC2025
Ruben Taelman also leads a tutorial on RDF & SPARQL 1.2 — a hands-on intro to the first spec update in a decade! Covers motivations, RDF-star, triple-terms & reification. 🔗 www.w3.org/Talks/2025/i... #ISWC2025
Our Knowledge on Web-Scale team is at #ISWC2025! 🎉 We’re sharing work on link prioritization, time functions in SPARQL, low-code ODRL tools, Trustflows, queryable VCs, client-side federation, plus tutorials on RDF/SPARQL 1.2 and RDF-Connect pipelines.
Named graphs in #RDF (2014) are still controversial after all this time and I don’t think they should be. While their semantics were left open, functionally we all use them as contextual assertions anyway. Prove me wrong 🤓 👉 pietercolpaert.be/linkeddata/2... #linkeddata #knowledgegraphs
the expert group on the Next Generation European Interoperability Framework (EIF) I’m part of is launching a survey to take your ideas into account. Do you have ideas about interoperability governance? Help us out: interoperable-europe.ec.europa.eu/collection/c...
On my way home after a fruitful #semantics2025! During the closing ceremony I had to honour to invite the audience to #semantics2026 in one of the most beautiful cities in the world. See you next year in Ghent!
As Linked Data practitioners we know vocabularies and shapes, but that’s not enough. Full interoperability needs two more artefacts: reusable interaction patterns across domains, and implementation guides to help developers avoid endless choices. Long read: pietercolpaert.be/interoperabi...