Author | Lightnews

Pieter Colpaert @pietercolpaert.be · 2d

Last but not least, Gertjan De Mulder shows how to query Verifiable Credentials via SPARQL in OID4VP flows. RDF graphs enable selective, privacy-preserving presentations.
🔗 ceur-ws.org/Vol-4085/pap...
#ISWC2025

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Pieter Colpaert @pietercolpaert.be · 2d

Wout Slabbinck and Beatriz Esteves present LOAMA — a low-code ODRL tool for access management. Visual policy editing for non-technical users & semantic integration.
🔗 ceur-ws.org/Vol-4085/pap...
#ISWC2025

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Pieter Colpaert @pietercolpaert.be · 2d

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

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Pieter Colpaert @pietercolpaert.be · 2d

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

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Pieter Colpaert @pietercolpaert.be · 2d

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

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Pieter Colpaert @pietercolpaert.be · 2d

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

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Pieter Colpaert @pietercolpaert.be · 2d

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

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Pieter Colpaert @pietercolpaert.be · 2d

Ruben Eschauzier and Ruben Taelman present “Revisiting Link Prioritization…”:evaluating link prioritization in #Solid environments. Defines the R3 metric, tests in Comunica, finds no gain over FIFO.
🔗 rubeneschauzier.github.io/r3-metric-da...
#ISWC2025

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Pieter Colpaert @pietercolpaert.be · 2d

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.

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Pieter Colpaert @pietercolpaert.be · 9d

Op zoek naar een locatie in centrum Gent waar je reservatie kan doen om te eten/drinken met 75-tal mensen, waarbij iedere tafel apart afrekent. Patrick Foley‘s geen optie: willen enkel in 1 keer afrekenen.

Pieter Colpaert @pietercolpaert.be · 9d

Sadly there are only 25 hours in a day

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Pieter Colpaert @pietercolpaert.be · 15d

Haha! I must confess I also do this

Ulrike Franke @rikefranke.bsky.social · 15d

How do people with kids get anything done, ever?
I’m serious, whenever I see someone roughly my age accomplish anything these days, first thing I do is check whether they have kids. Written a book? Cool. Written a book *while having kids*? You’re a GOD.

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Pieter Colpaert @pietercolpaert.be · 16d

The NextTrain Pebble app provides a countdown to your train you intended to catch in Belgium and the NL. UX-wise it is fabulous. I maintain the API behind it that has been online since 2010 and still is. So much looking fwd to using NextTrain again!

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Pieter Colpaert @pietercolpaert.be · 21d

I don’t think both ways of seeing named graphs are in conflict: you either choose what you do in your store, but I also see ways in which they can co-exist in 1 store if that’s what you want to do.

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Pieter Colpaert @pietercolpaert.be · 21d

They are still named, just with local identifiers that cannot conflict with any other external source

Pieter Colpaert @pietercolpaert.be · 25d

Thanks for recommending it! Happy to open the discussion on blank node graphs, I brought my arguments in favor ;)

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Pieter Colpaert @pietercolpaert.be · 28d

Lap, heb ik nu een groot gezin gemaakt, valt mijn korting weg

www.vrt.be/vrtnws/nl/20...

NMBS voert nieuwe tarieven in: reizen tijdens daluren en weekend wordt goedkoper dankzij voordeelkaart | VRT NWS: nieuws

Met de trein reizen tijdens de daluren of tijdens het weekend wordt goedkoper. Dat is het belangrijkste onderdeel van het nieuwe ticketaanbod van de NMBS. Op 15 oktober gaan de nieuwe tarieven in. Als...

www.vrt.be

Pieter Colpaert @pietercolpaert.be · Sep 30

In the attached image, I’m using named graphs on the one hand as a contextual assertion, but also to bundle triples together as an RDF Message. For the latter, I believe we should have another syntactic feature (cfr. NDJSON or Jelly frames).

Pieter Colpaert @pietercolpaert.be · Sep 30

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

A TRiG sample of using named graphs for various purposes

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Pieter Colpaert @pietercolpaert.be · Sep 16

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...

Pieter Colpaert @pietercolpaert.be · Sep 8

Wikidata, Wikimedia Commons, OpenStreetMap, UniProt, PubChem, DBLP, public transit schedules, our world in data, Europeana, data.europa.eu (the meta dataset), national statistics, ...

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Pieter Colpaert @pietercolpaert.be · Sep 5

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!

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Pieter Colpaert @pietercolpaert.be · Sep 3

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...

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Pieter Colpaert @pietercolpaert.be · Sep 2

Tomorrow it’s #semantics2025! Looking fwd to the keynote of Hannah Bast, the developer workshop, the RDF-Connect tutorial, the #sem4tra2025 workshop on semantics in transport, and the next generation data governance workshop! 🚀

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Reposted by Pieter Colpaert

OpenHPS @openhps.org · Apr 22

Our latest #OpenHPS update enables developers to stream processed (location) data to #Solid using Linked Data Event Streams ( #LDES ). Simply adding a sink to an OpenHPS model is all it takes to enable this in existing positioning systems.

Read more in our blog post ...
openhps.org/posts/2025/0...

Stream Location Data to Solid | OpenHPS

OpenHPS is a framework for processing sensor data to create a positioning system. In this blog post, we will demonstrate how OpenHPS can be used to stream location data directly to Solid to offer tran...

openhps.org

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