A short article on a subtle "gotcha" involving http and https in IRIs plus some info on catalog XML files

Description of a system developed using Retrieval Augmented Generation (RAG) and a knowledge graph as a portal for Climate Obstruction researchers

Describes SPARQL queries to separate TBox entities from ABox.

I've been using ChatGPT to help with various kinds of analysis and coding tasks. Today I had the problem of generating English labels for...

12/27/24. When I first published this I got some of the details wrong. Specifically my discussion of countable and uncountable infinite...

Describes developing a query to delete objects that have different IRIs but are essentially duplicates.

Using the Open AI Assistant tool to create an LLM enabled assistant to using the Basic Formal Ontology (BFO)

The reasons that puns are needed in the Web Ontology Language (OWL) and some discussion of how to use them

SPARQL query to delete asserted property values on datatype super properties

The DaanMatch project and how knowledge graphs and NLP were used to facilitate linking NGOs with the UN Sustainable Development Goals

Examples of using the Web Ontology Language to rigorously define theories in the social sciences

Note: There was a problem with the link to the PDF for the tutorial below. It worked for me because I owned the file but for others since...

Link to a YouTube playlist that takes you through some basic steps in Protégé

New version of Protégé rocks!

Describes ways to use the Simple Knowledge Organization System (SKOS) to define mappings from one Concept Scheme to another.

Basic concepts related to synonyms in the Web Ontology Language (OWL), Simple Knowledge Organization System (SKOS), and Protégé.

When you load an ontology from Desktop Protégé to Web Protégé defaults related to IRIs aren't what you would expect. Tells how to set them.

Case study of how Cellfie and SPARQL can automate developing an ontology to model the UN Sustainable Development Goals.

Discusses the pros and cons of property graphs (Neo4J and Cypher) contrasted with the Semantic Web stack: RDF, OWL, SPARQL, SHACL, SWRL

I recently wrote a paper with Robert Neches who used to be my boss at the Information Sciences Institute (ISI). When I work with...