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Using SPARQL to Delete Duplicate Instances
Describes developing a query to delete objects that have different IRIs but are essentially duplicates.
Michael DeBellis
Apr 9, 20243 min read
208 views
0 comments

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
Michael DeBellis
Nov 21, 20238 min read
693 views
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One Good Hack Deserves Another
SPARQL query to delete asserted property values on datatype super properties
Michael DeBellis
Nov 9, 20232 min read
46 views
0 comments


YouTube Videos for Protégé Tutorial
Link to a YouTube playlist that takes you through some basic steps in Protégé
Michael DeBellis
Jun 26, 20231 min read
1,373 views
2 comments

Using SKOS to Define Mappings
Describes ways to use the Simple Knowledge Organization System (SKOS) to define mappings from one Concept Scheme to another.
Michael DeBellis
Jan 10, 20236 min read
1,372 views
1 comment

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.
Michael DeBellis
Jan 10, 20236 min read
957 views
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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
Michael DeBellis
May 30, 20223 min read
2,641 views
1 comment

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...
Michael DeBellis
May 5, 20221 min read
1,117 views
0 comments


Using SPARQL to Refactor User Names to UUIDs
Use SPARQL to convert user supplied IRI names to UUIDs
Michael DeBellis
Dec 1, 20213 min read
588 views
0 comments
Semtech 2021 Workshop
Presentations from the Semtech 2021 Semantic Web workshop held at the Indian Statistical Institute.
Michael DeBellis
Apr 26, 20211 min read
274 views
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