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...

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

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

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...

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.

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

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