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.

Book review of Memory and the Computational Brain by Galliestel and King, it challenges the idea that all cognition is based on neurons.

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...

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...

New version of the Pizza Tutorial for Protégé. Consistent with latest Protégé UI and new sections for SWRL, SPARQL, and SHACL.

This post shows how to use SPARQL to take user defined names in IRIs and use them to fill in the rdfs:label with an appropriately...

Presentations from the Semtech 2021 Semantic Web workshop held at the Indian Statistical Institute.

Simple Web Ontology Language (OWL) vocabulary for measurements in units. Uses SWRL to compute orders and to transform units.

In Protégé and OWL an entity name can refer to the last part of the IRI or the label

CODO is an ontology to provide semantics to data on the Covid-19 pandemic