Using IndeGx and our endpoint catalog, I surveyed the usage of #RDF, #RDFS, #OWL, #SWRL, #SHACL, #SPIN, and #SKOS over 320 endpoints.
Some insights:
- Only 2 endpoints do not use RDF, one seems to have gone down during tests, and the other uses only Schema
- 11 endpoints use exclusively RDF
- Endpoints use an average of 3.8 of the listed vocabularies
- By far, the most used are RDF, RDFS, OWL and SKOS
- All vocabularies are used together at least once
More details to follow
#linkeddata #sparql

What if OWL is not enough? In this hands-on tutorial of our #kg2023 lecture @sashabruns is showing you how to create and exploit SWRL rules with protégé.
#OpenHPI video: https://open.hpi.de/courses/knowledgegraphs2023/items/2kdpe9211wKu8H2Vc5D8va
youtube video: https://www.youtube.com/watch?v=I81pLmK_lHg&list=PLNXdQl4kBgzubTOfY5cbtxZCgg9UTe-uF&index=57
Slides: https://zenodo.org/records/10136317
@fiz_karlsruhe @fizise @tabea @KIT_Karlsruhe #knowledgegraphs #owl #swrl #ontologies #semanticweb

In the next section of our #kg2023 lecture you will learn about the Semantic Web Rule Language SWRL, adding the potential of logical rules to the description logics based #SemanticWeb technology stack.
#OpenHPI video: https://open.hpi.de/courses/knowledgegraphs2023/items/65bnt9mLKrCsVTPF9MLpsF
youtube video: https://www.youtube.com/watch?v=645EaHJK7lQ&list=PLNXdQl4kBgzubTOfY5cbtxZCgg9UTe-uF&index=49
slides: https://zenodo.org/records/10135451
@fizise @tabea @sashabruns @MahsaVafaie #knowledgegraphs #rules #ai #swrl #lecture

Protégé: A free, open-source ontology editor for building intelligent systems
https://protege.stanford.edu/
#ycombinator #protege #protégé #owl #ontology #ontologies #ontology_editor #knowledge_base #intelligent_system #description_logics #reasoning #stanford #swrl #sparql #frames

Interpreting Swrl Rules in Rdf Graphs
(2006) : Jing Mei and Harold Boley
DOI: https://doi.org/10.1016/j.entcs.2005.07.036
#OWL #RDF #SWRL #bottom_up #fixpoint_semantics #model_theory #rule_language #semantic_web
#my_bibtex

When should we use #SWRL?