The Opinionated Ontologist

What's in a Triple?

Fri, 23 May 2025 17:34:03 GMT

We discuss reification using the W3C draf recommendation RDF 1.2, modeling choices, and how the approach is similar to, and different from, edge properties in Labeled Property Graphs.

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KGC-palooza!

Fri, 09 May 2025 02:11:15 GMT

This week I was at the Knowledge Graph Conference, the biggest industry Graph AI conference out there! I spoke with Bob Metcalfe of network effect fame, Peter Crocker of Oxford Semantics, and a huge KGC crew of ontologists, technologists, and knowledge graph experts.

Featuring:

Bob Metcalfe
Peter Crocker
Mara Inglezakis Owens
Margaret Warren
Pete Rivett
Hande McGinty
Tom Plasterer
Ora Lassila
Keith Corbett
Elisa Kendall
Larry Swanson
Deborah McGuinness

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What's so Basic about BFO?

Tue, 06 May 2025 03:47:02 GMT

We continue our mini series on upper level ontologies with an episode on the Basic Formal Ontology, or BFO. John Beverley of University at Buffalo joins us. John is the current steward of BFO, and works with its founder Barry Smith on its use in domain applications.

For more information about BFO, visit their github page at https://github.com/BFO-ontology/BFO-2020.

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Upper Ontologies: gist

Sat, 12 Apr 2025 01:07:07 GMT

This week we discuss the upper level ontology gist with its creator, Dave McComb.

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What Does Medicine Mean?

Sun, 06 Apr 2025 16:24:19 GMT

Chime Ogbuji joins me to talk about the role of medical informatics in knowledge graphs and semantics, all the way from MYCIN and GALEN to today.

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Careful with that Predicate, Eugene!

Wed, 26 Mar 2025 21:03:47 GMT

Properties are the workhorse of ontologies, where semantics really happen. So be careful when you make a new one!

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What's So Hard to Understand?

Thu, 20 Mar 2025 03:01:30 GMT

Keith Corbett and Grace Roessling join us for a discussion about learning RDF, OWL, and knowledge graphs.

Keith: For nearly 50 years, Keith has been a technical communicator, data modeler, and knowledge engineer. Then and now, he has explored the intersections of deterministic AI, hypertext, and graph data.

Grace: Grace is a PhD candidate cognitive science at Rensselaer Polytechnic Institute. in the Perception and Action lab with Dr. Brett Fajen. Her dissertation is focused on how humans combine vision and spatial knowledge to guide high speed steering.

References

Larkin & Simon (1987) -- list vs. diagrammatic representations (https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1551-6708.1987.tb00863.x)
Temple Grandin (2016) -- visual thinking, pattern mathematical thinking, and verbal/auditory thinking (https://www.jstor.org/stable/26407108?seq=3)

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What's an Ontology?

Wed, 12 Mar 2025 21:47:14 GMT

In this episode, Deborah McGuinness and I discuss ontologies: what's in them, what they're used for, what makes them good, and how to go about making them.

Notes and links:

Deborah McGuinness: https://tw.rpi.edu/person/Deborah_L_McGuinness
The Ontology Spectrum: https://www.researchgate.net/publication/221024668_Ontologies_Come_of_Age
Schemas vs ontologies: https://www.w3.org/wiki/SchemaVsOntology Ontology and database schema: What's the difference?
Ontologies 101: https://protege.stanford.edu/publications/ontology_development/ontology101.pdf
Ontology Engineering: https://ieeexplore.ieee.org/book/8701593

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What are we talking about?

Wed, 05 Mar 2025 19:53:29 GMT

Today we flip the script: Prof. Zara Waldman DeLuca interviews Jamie on the fundamentals of knowledge graphs and ontologies, and they talk about some of the social, linguistic, and cognitive aspects of human vs machine cognition.

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How does RAG work with KGs?

Wed, 26 Feb 2025 22:13:00 GMT

Today I was joined by David Hyland-Wood to discuss how Retrieval-Augmented Generation (RAG) works with Knowledge Graphs. We also talked about LLM bullshit, and the relationship between RAG systems, knowledge graphs, and open-source large language models, and explore the importance of modeling knowledge graphs for effective output.

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Whatever Happened to Autonomous Agents?

Wed, 19 Feb 2025 19:53:28 GMT

Today, start at the beginning, and talk with one of the fathers of the Semantic Web, Ora Lassila. We take a look at the origins of the semantic web in autonomous agents, talk for a while about why the design of RDF works the way it does (and how it's different from Labeled Property Graphs), and what the future of autonomous agents might be.

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What are we even doing here?

Thu, 13 Feb 2025 22:05:57 GMT

In which I test the audio settings and tell you what's coming.

Visit our Patreon at patreon.com/OpinonatedOntologist to support this podcast!

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