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
- Nov 21, 2023
- 8 min
Puns in the Web Ontology Language (OWL): Why We Need Them and How to Use Them
The reasons that puns are needed in the Web Ontology Language (OWL) and some discussion of how to use them
438 views0 comments
Michael DeBellis
- Nov 9, 2023
- 2 min
One Good Hack Deserves Another
SPARQL query to delete asserted property values on datatype super properties
38 views0 comments
Michael DeBellis
- Oct 25, 2023
- 3 min
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
181 views0 comments
Michael DeBellis
- Aug 28, 2023
- 2 min
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...
655 views1 comment
Michael DeBellis
- Jun 26, 2023
- 1 min
YouTube Videos for Protégé Tutorial
Link to a YouTube playlist that takes you through some basic steps in Protégé
842 views2 comments
Michael DeBellis
- Feb 28, 2023
- 2 min
New Version of Protégé!
New version of Protégé rocks!
779 views2 comments
Michael DeBellis
- Jan 10, 2023
- 6 min
Using SKOS to Define Mappings
Describes ways to use the Simple Knowledge Organization System (SKOS) to define mappings from one Concept Scheme to another.
1,067 views1 comment
Michael DeBellis
- Jan 10, 2023
- 6 min
Synonyms, IRIs, and Labels in OWL and SKOS
Basic concepts related to synonyms in the Web Ontology Language (OWL), Simple Knowledge Organization System (SKOS), and Protégé.
726 views0 comments
Michael DeBellis
- Dec 22, 2022
- 4 min
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.
1,308 views1 comment
Michael DeBellis
- Nov 17, 2022
- 3 min
UN Sustainable Development Goals Ontology
Case study of how Cellfie and SPARQL can automate developing an ontology to model the UN Sustainable Development Goals.
373 views0 comments
Michael DeBellis
- May 30, 2022
- 3 min
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
2,228 views1 comment
Michael DeBellis
- Jan 25, 2022
- 2 min
Testing and Debugging Ontologies
Best practices for creating and using individuals as test data for OWL ontologies
538 views0 comments
Michael DeBellis
- Jan 14, 2022
- 2 min
Memory Management with Protégé
A common problem that Protégé users encounter when they start working with large ontologies is running out of memory, which results in an...
836 views2 comments
Michael DeBellis
- Jan 4, 2022
- 2 min
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...
921 views0 comments
Michael DeBellis
- Dec 1, 2021
- 3 min
Using SPARQL to Refactor User Names to UUIDs
Use SPARQL to convert user supplied IRI names to UUIDs
545 views0 comments
Michael DeBellis
- Oct 19, 2021
- 2 min
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.
553 views0 comments
Michael DeBellis
- Oct 7, 2021
- 2 min
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...
4,702 views3 comments
Michael DeBellis
- Sep 30, 2021
- 3 min
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.
26,224 views17 comments
Michael DeBellis
- Apr 26, 2021
- 1 min
Semtech 2021 Workshop
Presentations from the Semtech 2021 Semantic Web workshop held at the Indian Statistical Institute.
260 views0 comments
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