Michael DeBellis
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
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Michael DeBellis
- Jan 25
- 2 min
Testing and Debugging Ontologies
Best practices for creating and using individuals as test data for OWL ontologies
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Michael DeBellis
- Jan 14
- 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...
235 views1 comment
Michael DeBellis
- Jan 4
- 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...
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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
183 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.
347 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...
1,649 views0 comments
Michael DeBellis
- Sep 30, 2021
- 1 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.
9,722 views4 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.
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Michael DeBellis
- Feb 3, 2021
- 4 min
A Simple Measurement Vocabulary
Simple Web Ontology Language (OWL) vocabulary for measurements in units. Uses SWRL to compute orders and to transform units.
325 views0 comments
Michael DeBellis
- Dec 7, 2020
- 4 min
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
774 views0 comments
Michael DeBellis
- Aug 7, 2020
- 2 min
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
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Michael DeBellis
- Jun 26, 2020
- 3 min
Drools vs. Pellet for SWRL rules
This explains the difference between using the Drools buttons at the bottom of the SWRLTab and using Pellet and why Pellet is usually better
743 views2 comments
Michael DeBellis
- Oct 16, 2019
- 3 min
Some Best Practices for New Protege Users
Collection of blog posts that describe best practices and tips for new users of Protege, OWL, and SWRL
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Michael DeBellis
- Oct 10, 2019
- 2 min
OWL Best Practices: Some Theoretical Basics
Overview of the theory behind OWL as well as how OWL relates to other CS paradigms such as OOP and relational DBs
1,240 views0 comments
Michael DeBellis
- Oct 4, 2019
- 3 min
Protege Best Practices: Export Inferred Axioms
How to save reasoner inferences in an OWL file
1,576 views2 comments
Michael DeBellis
- Sep 12, 2019
- 3 min
SWRL Tip: Removing Ontology Prefixes from SWRL rules
How to remove ontology prefixes for the base ontology from SWRL rules
293 views0 comments
Michael DeBellis
- Jul 22, 2019
- 1 min
Semantic Web Rule Language (SWRL) Process Modeling Tutorial
A simple tutorial to learn SWRL by developing a small ontology for modeling software processes
3,044 views1 comment