#shacl — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #shacl, aggregated by home.social.
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🤠 #KDAI2026 final lecture on #KnowledgeGraphs 04 & #NeurosymbolicAI
The final graph session, then the leap to hybrid AI:
▸ OWL — complex classes & property restrictions
▸ SHACL Shapes
▸ Neurosymbolic AI with KG embeddings, RAG,
▸ AI limits revisited (ELIZA, Clever Hans, Chinese Room, Turing Test, the paperclip maximiser & the singularity).Neither symbols nor learning alone get us there. 📡 SEE YOU SPACE COWBOY…
#SemanticWeb #OWL #SHACL #RAG #Ontologies #LLM @fiz_karlsruhe @KIT_Karlsruhe #AI
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🤠 #KDAI2026 final lecture on #KnowledgeGraphs 04 & #NeurosymbolicAI
The final graph session, then the leap to hybrid AI:
▸ OWL — complex classes & property restrictions
▸ SHACL Shapes
▸ Neurosymbolic AI with KG embeddings, RAG,
▸ AI limits revisited (ELIZA, Clever Hans, Chinese Room, Turing Test, the paperclip maximiser & the singularity).Neither symbols nor learning alone get us there. 📡 SEE YOU SPACE COWBOY…
#SemanticWeb #OWL #SHACL #RAG #Ontologies #LLM @fiz_karlsruhe @KIT_Karlsruhe #AI
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The new #KDAI2026 lecture is out. How to get from a sentence to something a machine can actually reason?
The greenhouse effect was discovered by Fourier, explained by Eunice Newton Foote. 3 words, 1 triple: subject, predicate, object. Stack enough of them and you get a graph. Add an ontology and the machine starts to infer.
This session:
▸ Graphs & triples
▸ #KnowledgeGraphs & #ontologies
▸ #SemanticWeb & #LinkedData
▸ #RDF, RDFS, #SPARQL, #OWL, #SHACL
CU space cowboy… -
The new #KDAI2026 lecture is out. How to get from a sentence to something a machine can actually reason?
The greenhouse effect was discovered by Fourier, explained by Eunice Newton Foote. 3 words, 1 triple: subject, predicate, object. Stack enough of them and you get a graph. Add an ontology and the machine starts to infer.
This session:
▸ Graphs & triples
▸ #KnowledgeGraphs & #ontologies
▸ #SemanticWeb & #LinkedData
▸ #RDF, RDFS, #SPARQL, #OWL, #SHACL
CU space cowboy… -
Yesterday I pushed a major update to the experimental #SHACL 1.2 branch of shacl-engine.
It now supports most SHACL 1.2 Core, Node Expression, and SPARQL features. The implementation is still incomplete — reification, some constraint components, and several node expression functions are still missing — but those are coming soon.
You can already try it directly in the browser:
https://playground.rdf-ext.org/shacl-experimental/GitHub repo:
https://github.com/rdf-ext/shacl-engine/tree/experimental -
Yesterday I pushed a major update to the experimental #SHACL 1.2 branch of shacl-engine.
It now supports most SHACL 1.2 Core, Node Expression, and SPARQL features. The implementation is still incomplete — reification, some constraint components, and several node expression functions are still missing — but those are coming soon.
You can already try it directly in the browser:
https://playground.rdf-ext.org/shacl-experimental/GitHub repo:
https://github.com/rdf-ext/shacl-engine/tree/experimental -
Good morning Dubrovnik! ESWC 2026 - the 23rd European Semantic Web Conference is starting today. Looking forward to visionary and inspiring keynotes, presentations, and posters, esp. addressing the question on how #SemanticWeb technologies will survive (or even prevail...) the current 3rd wave of #AI
https://2026.eswc-conferences.org/
#SemanticWeb #knowledgegraphs #ontologies #shacl #AI #llms #generativeAI #reliableAI #explainableAI #ESWC2026 #dubrovnik
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Good morning Dubrovnik! ESWC 2026 - the 23rd European Semantic Web Conference is starting today. Looking forward to visionary and inspiring keynotes, presentations, and posters, esp. addressing the question on how #SemanticWeb technologies will survive (or even prevail...) the current 3rd wave of #AI
https://2026.eswc-conferences.org/
#SemanticWeb #knowledgegraphs #ontologies #shacl #AI #llms #generativeAI #reliableAI #explainableAI #ESWC2026 #dubrovnik
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As interest in knowledge graphs grows by the day, @veronahe is busier than ever with her efforts to connect the #dataEngineering, #informationArchitecture, and #ontology practices that drive modern knowledge engineering.
Best known as an advanced #knowledgeGraph practitioner and a leading expert on the #SHACL standard, Veronika also regularly shares her knowledge by teaching and appearing on podcasts like this one.
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This is Koblenz Hbf, the main train station in #Koblenz, #Germany. I am waiting for the train to Stuttgart. This is the third time @Ayenkantun and I visited Koblenz. This time we traveled to attend Philipp Seifer's PhD defense. I co-author several papers with him about #SPARQL #KnowledgeGraphs #SHACL #SemanticWeb He did a great defense! I am very happy!
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This is Koblenz Hbf, the main train station in #Koblenz, #Germany. I am waiting for the train to Stuttgart. This is the third time @Ayenkantun and I visited Koblenz. This time we traveled to attend Philipp Seifer's PhD defense. I co-author several papers with him about #SPARQL #KnowledgeGraphs #SHACL #SemanticWeb He did a great defense! I am very happy!
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Most data comes from closed-world systems — forms, sensors, logs — with known schemas. Yet the RDF community often says: adopt the full semantic web stack or nothing.
My latest post explores practical RDF for closed-world systems:
- When closed-world makes sense
- Real examples: sensors, IoT, forms
- How Netflix uses RDF+SHACL at scale
- New SHACL 1.2 features
Read more: https://www.bergnet.org/2026/03/closed-world-systems/
#RDF #SHACL #JSON-LD #Ontop -
Most data comes from closed-world systems — forms, sensors, logs — with known schemas. Yet the RDF community often says: adopt the full semantic web stack or nothing.
My latest post explores practical RDF for closed-world systems:
- When closed-world makes sense
- Real examples: sensors, IoT, forms
- How Netflix uses RDF+SHACL at scale
- New SHACL 1.2 features
Read more: https://www.bergnet.org/2026/03/closed-world-systems/
#RDF #SHACL #JSON-LD #Ontop -
We are very pleased to announce the publication of our complet #RDF Data Model as Shapes (#SHACL)
https://shapes.performing-arts.ch/
Special Thanks to @sparna who guides us in this work
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We are very pleased to announce the publication of our complet #RDF Data Model as Shapes (#SHACL)
https://shapes.performing-arts.ch/
Special Thanks to @sparna who guides us in this work
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There are many benefits when the inference rules are included in the knowledge graph. One benefit is the decoupling of data and application. It lowers the cost of integration and the cost of change. Another is the improved data governance.
A third one is the gain in flexibility
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There are many benefits when the inference rules are included in the knowledge graph. One benefit is the decoupling of data and application. It lowers the cost of integration and the cost of change. Another is the improved data governance.
A third one is the gain in flexibility
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There are many benefits when the inference rules are included in the knowledge graph. One benefit is the decoupling of data and application. It lowers the cost of integration and the cost of change. Another is the improved data governance.
A third one is the gain in flexibility. 👇📜
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There are many benefits when the inference rules are included in the knowledge graph. One benefit is the decoupling of data and application. It lowers the cost of integration and the cost of change. Another is the improved data governance.
A third one is the gain in flexibility. 👇📜
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📜 New essay on Link&Think
Rules are usually in the application layer.
With #SHACL rules, they can be part of the graph, and then, apart from simplicity and speed, they can bring other benefits coming from data-application decoupling.Part 1 is now available.
https://www.linkandth.ink/p/rules-on-graphs-in-graphs-of-rules
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📜 New essay on Link&Think
Rules are usually in the application layer.
With #SHACL rules, they can be part of the graph, and then, apart from simplicity and speed, they can bring other benefits coming from data-application decoupling.Part 1 is now available.
https://www.linkandth.ink/p/rules-on-graphs-in-graphs-of-rules
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It's happening again.
👉 https://semweb.pro/conference/2025/
Nous serons présents jeudi 27 novembre prochain à la conférence @semwebpro qui aura lieu au FIAP Paris !
#semwebpro #semweb #websem #opendata #linkeddata #linkedopendata #knowledgegraph #thesaurus #ontology #RDF #SPARQL #SHACL #OWL #JSONLD
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Tired of the LLM noise? Let’s shift attention to something fully deterministic – rules running over a knowledge graph.
(now on the plane to London)
#SHACL #SPARQL
https://2025.connected-data.london/talks/rules-for-speed-simplicity-data-centricity/ -
Tired of the LLM noise? Let’s shift attention to something fully deterministic – rules running over a knowledge graph.
(now on the plane to London)
#SHACL #SPARQL
https://2025.connected-data.london/talks/rules-for-speed-simplicity-data-centricity/ -
I have reviewed many #SHACL shape graphs over the last few years. There are some error patterns as well as exotic errors. And recently, I've noticed some very different patterns of LLM-generated errors.
Declarative code errors tend to be semantic illusions -- they mirror the user’s intent linguistically but diverge logically. Procedural errors, instead, are often syntactic or structural.
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I have reviewed many #SHACL shape graphs over the last few years. There are some error patterns as well as exotic errors. And recently, I've noticed some very different patterns of LLM-generated errors.
Declarative code errors tend to be semantic illusions -- they mirror the user’s intent linguistically but diverge logically. Procedural errors, instead, are often syntactic or structural.
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"Translating and Formalizing the MIRAGE Guidelines to a Prototype MIRAGE Ontology and DCAT3 Extension Vocabulary for Glycomics Data Management" https://doi.org/10.37044/osf.io/wj8bz_v1
"We present the first comprehensive semantic formalization of MIRAGE guidelines through an integrated RDF ontology framework comprising the MIRAGE Ontology and MIRAGE-DCAT3 vocabulary. The MIRAGE Ontology models glycan structures, biological specimens, analytical instruments, and experimental processes with formal OWL semantics and SHACL validation constraints." https://index.biohackrxiv.org//2025/09/30/wj8bz.html
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Maxime Jakubowski presenting our work on "RDFGraphGen: An #RDF Graph Generator based on #SHACL Shapes" at #IJCKG25.
authors:
Milos Jovanovik, Marija Vecovska, Maxime Jakubowski, Katja Hose -
Maxime Jakubowski presenting our work on "RDFGraphGen: An #RDF Graph Generator based on #SHACL Shapes" at #IJCKG25.
authors:
Milos Jovanovik, Marija Vecovska, Maxime Jakubowski, Katja Hose -
🌞 Pendant l'été, le comité de programme de SemWeb.Pro n'a pas chômé et vous a concocté une belle journée !
🗓️ Pour SemWeb.Pro 2025 qui aura lieu le 27 novembre 2025 à Paris ,nous aurons 7 présentations et un peu moins d'une dizaine de posters: https://semweb.pro/conference/2025/
🎫 Les inscriptions sont maintenant ouvertes et vous pouvez profiter du tarif réduit jusqu'à début octobre.
🔍 On reviendra en détail sur le programme dans les prochains jours.
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Er is nu een publiek #SPARQL-endpoint beschikbaar voor #TOOI - Thesauri en Ontologieën voor OverheidsInformatie.
Je kunt het hier zelf proberen:
https://standaarden.overheid.nl/tooi/sparql
Ben je geïnteresseerd in TOOI, schrijf je dan in voor de nieuwsbrief via:
https://standaarden.overheid.nl/tooi/nieuwsbrief
Dit is de laatste nieuwsbrief:
https://standaarden.overheid.nl/tooi/nieuwsbrief/2025/1
#RDF #LinkedData #OWL #SHACL #overheid #FOSS #opensource #OpenTenzij #standaard #consultatie
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Er is nu een publiek #SPARQL-endpoint beschikbaar voor #TOOI - Thesauri en Ontologieën voor OverheidsInformatie.
Je kunt het hier zelf proberen:
https://standaarden.overheid.nl/tooi/sparql
Ben je geïnteresseerd in TOOI, schrijf je dan in voor de nieuwsbrief via:
https://standaarden.overheid.nl/tooi/nieuwsbrief
Dit is de laatste nieuwsbrief:
https://standaarden.overheid.nl/tooi/nieuwsbrief/2025/1
#RDF #LinkedData #OWL #SHACL #overheid #FOSS #opensource #OpenTenzij #standaard #consultatie
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"Retour sur la mise en oeuvre d'un modèle de données ouvert dans une institution patrimoniale"
Voici le thème que nous aurons le plaisir de présenter le 15 octobre 2025 lors la journée d'étude DaSCHCon à Berne (Suisse).
Les inscriptions sont ouvertes ! Les places limitées sur place mais la journée peut aussi être suivie à distance.
La présentation sera disponible en ligne après la journée.
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Merk op: de website van het Register Overheidsorganisaties (#ROO) is hier te vinden:
https://organisaties.overheid.nl/
Verder: ROO maakt ook gebruik van #TOOI, Thesauri en Ontologieën voor Overheidsinformatie
De ambitie is om TOOI helemaal publiek te ontwikkelen. Zie: https://gitlab.com/koop/tooi
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Merk op: de website van het Register Overheidsorganisaties (#ROO) is hier te vinden:
https://organisaties.overheid.nl/
Verder: ROO maakt ook gebruik van #TOOI, Thesauri en Ontologieën voor Overheidsinformatie
De ambitie is om TOOI helemaal publiek te ontwikkelen. Zie: https://gitlab.com/koop/tooi
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Today, I had the great pleasure of giving an introductory lecture on knowledge graphs at the #BILAI Summer School 2025 in Klagenfurt. Great energy and engagement!
#knowledgeGraphs #RDF #SHACL #SPARQL #LLMhttps://www.bilateral-ai.net/doctoral-school/summer-school-2025
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Today, I had the great pleasure of giving an introductory lecture on knowledge graphs at the #BILAI Summer School 2025 in Klagenfurt. Great energy and engagement!
#knowledgeGraphs #RDF #SHACL #SPARQL #LLMhttps://www.bilateral-ai.net/doctoral-school/summer-school-2025
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Merci à tous pour vos présentations !
Nous avons reçu cette année 17 propositions pour SemWeb.pro 2025 !
Retrouvons-nous le 15 juillet pour découvrir le programme de cette édition.
📆 : 27 novembre 2025
📌 @Fiap Paris#semweb #websem #opendata #linkeddata #linkedopendata
#knowledgegraph #thesaurus #ontology #RDF #SPARQL #SHACL #OWL #JSONLD -
🏆 Honored to receive the IFIP TC2 Manfred Paul Award (2024) together with Kashif Rabbani and @kuzeko for our VLDB 2023 paper "Extraction of Validating Shapes from Very Large Knowledge Graphs".
We propose a method to generate #SHACL shapes from large knowledge graphs — scalable to billions of triples, mining meaningful patterns based on support and confidence, and enabling effective data validation and quality assessment at scale.
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🏆 Honored to receive the IFIP TC2 Manfred Paul Award (2024) together with Kashif Rabbani and @kuzeko for our VLDB 2023 paper "Extraction of Validating Shapes from Very Large Knowledge Graphs".
We propose a method to generate #SHACL shapes from large knowledge graphs — scalable to billions of triples, mining meaningful patterns based on support and confidence, and enabling effective data validation and quality assessment at scale.
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I have just published shaclgen 3.0.0b1, please test: 💾 https://pypi.org/project/shaclgen/3.0.0b1/
There was no release of #shaclgen since almost 5 years. There were many changes in between including major #rdflib releases. A changelog can be retrieved from the commit history.
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📣 Appel à candidatures #SemWebPro !
Le comité de programme souhaite intégrer de nouveaux membres ! Vous souhaitez nous aider à faire connaître cet évènement ?Alors, rejoignez-nous !
Candidature avant le 30 avril à
[email protected] 📧#semweb #websem #opendata #linkeddata #linkedopendata #knowledgegraph #thesaurus #ontology #RDF #SPARQL #SHACL #OWL #JSONLD
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[proposal] How to distinguish between UI and non-UI property shapes in #SHACL · Issue #332 · w3c/data-shapes](https://github.com/w3c/data-shapes/issues/332)
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[proposal] How to distinguish between UI and non-UI property shapes in #SHACL · Issue #332 · w3c/data-shapes](https://github.com/w3c/data-shapes/issues/332)
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I added support for some experimental SHACL 1.2. features in shacl-engine. See my blog post https://www.bergnet.org/2025/03/shacl-engine-experimental/ for more details, and try it out on the SHACL Playground https://playground.rdf-ext.org/shacl-experimental/ #shacl
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I added support for some experimental SHACL 1.2. features in shacl-engine. See my blog post https://www.bergnet.org/2025/03/shacl-engine-experimental/ for more details, and try it out on the SHACL Playground https://playground.rdf-ext.org/shacl-experimental/ #shacl
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🔗 SHACL-SKOS Based Knowledge Representation of Material Safety Data Sheet (SDS) for the Pharmaceutical Industry
https://arxiv.org/abs/2502.07944
#rdf #shacl #skos #triples #semanticweb #cs #msds #safety #pharmaceuticals
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RDF people: why does everyone still use RDFS and not SHACL for writing schemas, when all the actual validation tools are for SHACL?
Are there even any RDFS validators? I can't find any.
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Another #SHACL course in #Brussels with participants from all over Europe.
It's nice to see that the interest is growing.
And now the work on the new version of SHACL has started: https://lists.w3.org/Archives/Public/public-shacl/2024Dec/0000.html -
We are conducting a #survey to better understand the challenges, experiences, and practical applications of validating #RDF data using #SHACL and #ShEx.
Please help us get a better overview by sharing your insights:
https://forms.gle/LdXsG644obcgSsAE6It only takes around 8 minutes.
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Is your knowledge graph complete?
Does it contain errors?
How do we measure this?
Last week, we discussed SHACL, the Shapes Constraint Language, to enable quality assurance for #knowledgeGraphs.Lexcture slides: https://drive.google.com/file/d/1fmo0z7fzc1NFRK6eKpbTzTOV8w5P9QHB/view?usp=drive_link
#ISE2024 SHACL GitHub resources: https://github.com/lysander07/ISE-2022-Complement--SHACL#SHACL #SemanticWeb #QualityAssurance #LinkedData #shapes @sourisnumerique @enorouzi @shufan @fizise @fiz_karlsruhe #aiart #dragon #astronaut
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Besides discussing OWL and SHACL in the last #ISE2024 lecture, we also provided 2 colab notebooks for you to demonstrate how to work with #knowledgegraphs in python
slides: https://drive.google.com/file/d/1fmo0z7fzc1NFRK6eKpbTzTOV8w5P9QHB/view?usp=drive_link
notebook 1: https://colab.research.google.com/drive/18mDqGSN-mi2NZ4n9J2Hy-qTWwo4kScrd?usp=drive_link
notebook 2: https://colab.research.google.com/drive/1oz9AQOTxxzfzxRYvANjiKPRXQhtJBY-T?usp=drive_link@fizise @fiz_karlsruhe @enorouzi @sourisnumerique @shufan #python #lecture #semanticweb #owl #shacl #aiart
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Version 1.0 of the JavaScript #shacl library shacl-engine is out. here are no breaking changes, only new features, but to indicate that this package is production ready, the version was lifted from 0.x to 1.x.
via ThomasBergwinkl@LinkedIn @bergi -
Version 1.0 of the JavaScript #shacl library shacl-engine is out [1]! There are no breaking changes, only new features, but to indicate that this package is production ready, the version was lifted from 0.x to 1.x. Thanks to the #comunica library [2], support for #sparql constraints was added. Along with that feature, custom validation support was added.
[1] https://github.com/rdf-ext/shacl-engine
[2] https://comunica.dev/ -
SCOOP is a cool tool presented by Xuemin Duan from KU Leuven at #eswc2024. The SCOOP framework integrates the SHACL shapes extracted from RDF data schemas, ontologies, and mapping rules into a unified shapes graph
Paper: https://2024.eswc-conferences.org/wp-content/uploads/2024/04/146640551.pdf
GitHub: https://github.com/dtai-kg/SCOOP