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...

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

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

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

Best practices for creating and using individuals as test data for OWL ontologies

A common problem that Protégé users encounter when they start working with large ontologies is running out of memory, which results in an...

In a previous blog post I discussed the difference between user supplied names for IRIs and UUIDs. I want to share a tip that Jim Balhoff...

Use SPARQL to convert user supplied IRI names to UUIDs

A paper on the CODO knowledge graph that captures epidemiological and contact tracing data about the Covid-19 pandemic.

I'm working on an article where I provide an overview of the various semantic web technologies such as OWL, SWRL, SPARQL, and SHACL. As...