Michael DeBellis
Using SPARQL to Delete Duplicate Instances
Describes developing a query to delete objects that have different IRIs but are essentially duplicates.
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Michael DeBellis
Oct 25, 20233 min read
The DaanMatch System: A Knowledge Graph linking NGOs with UN Sustainable Development Goals
The DaanMatch project and how knowledge graphs and NLP were used to facilitate linking NGOs with the UN Sustainable Development Goals
206 views0 comments
Michael DeBellis
Oct 24, 20234 min read
Using OWL Models to Bring Rigor to the "Soft" Sciences
Examples of using the Web Ontology Language to rigorously define theories in the social sciences
134 views0 comments
Michael DeBellis
Aug 28, 20232 min read
Creating a Custom Rules View Tab
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...
737 views1 comment
Michael DeBellis
Jan 10, 20236 min read
Using SKOS to Define Mappings
Describes ways to use the Simple Knowledge Organization System (SKOS) to define mappings from one Concept Scheme to another.
1,190 views1 comment
Michael DeBellis
Dec 22, 20224 min read
IRI Mappings in Protégé and Web 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.
1,471 views1 comment
Michael DeBellis
Nov 17, 20223 min read
UN Sustainable Development Goals Ontology
Case study of how Cellfie and SPARQL can automate developing an ontology to model the UN Sustainable Development Goals.
404 views0 comments
Michael DeBellis
May 30, 20223 min read
Semantic Web vs. Property Graphs
Discusses the pros and cons of property graphs (Neo4J and Cypher) contrasted with the Semantic Web stack: RDF, OWL, SPARQL, SHACL, SWRL
2,373 views1 comment
Michael DeBellis
May 5, 20221 min read
Knowledge Representation and the Semantic Web
I recently wrote a paper with Robert Neches who used to be my boss at the Information Sciences Institute (ISI). When I work with...
998 views0 comments
Michael DeBellis
Jan 25, 20222 min read
Testing and Debugging Ontologies
Best practices for creating and using individuals as test data for OWL ontologies
590 views0 comments
Michael DeBellis
Jan 4, 20222 min read
Making UUIDs Easier to Use With Prefixes
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...
1,016 views0 comments
Michael DeBellis
Dec 1, 20213 min read
Using SPARQL to Refactor User Names to UUIDs
Use SPARQL to convert user supplied IRI names to UUIDs
562 views0 comments
Michael DeBellis
Oct 19, 20212 min read
An Agile Approach to Knowledge Graph Development
A paper on the CODO knowledge graph that captures epidemiological and contact tracing data about the Covid-19 pandemic.
562 views0 comments
Michael DeBellis
Oct 7, 20212 min read
The People_Example Ontology
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...
5,144 views4 comments
Michael DeBellis
Sep 30, 20213 min read
New Protégé Pizza Tutorial
New version of the Pizza Tutorial for Protégé. Consistent with latest Protégé UI and new sections for SWRL, SPARQL, and SHACL.
28,443 views17 comments
Michael DeBellis
Apr 26, 20211 min read
Semtech 2021 Workshop
Presentations from the Semtech 2021 Semantic Web workshop held at the Indian Statistical Institute.
268 views0 comments
Michael DeBellis
Dec 7, 20204 min read
What's in a Name? IRIs, Labels, and UUIDs
In Protégé and OWL an entity name can refer to the last part of the IRI or the label
1,779 views2 comments
Michael DeBellis
Aug 7, 20202 min read
CODO: An Ontology for Collection and Analysis of Covid-19 Data
CODO is an ontology to provide semantics to data on the Covid-19 pandemic
560 views0 comments
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