top of page
Search
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...
1,012 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
607 views0 comments
Michael DeBellis
Jan 14, 20222 min read
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...
892 views2 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...
1,045 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
571 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.
563 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...
5,287 views5 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.
28,989 views17 comments
Michael DeBellis
Sep 9, 20212 min read
Refactoring Names w SPARQL
This post shows how to use SPARQL to take user defined names in IRIs and use them to fill in the rdfs:label with an appropriately...
561 views1 comment
Michael DeBellis
Apr 26, 20211 min read
Semtech 2021 Workshop
Presentations from the Semtech 2021 Semantic Web workshop held at the Indian Statistical Institute.
270 views0 comments
Michael DeBellis
Feb 3, 20214 min read
A Simple Measurement Vocabulary
Simple Web Ontology Language (OWL) vocabulary for measurements in units. Uses SWRL to compute orders and to transform units.
517 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
1,796 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
562 views0 comments
Michael DeBellis
Jun 26, 20203 min read
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
1,940 views10 comments
Michael DeBellis
Oct 16, 20193 min read
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
1,971 views1 comment
Michael DeBellis
Oct 15, 20192 min read
OWL Best Practices: Implementing N-ary Relations
How to implement N-ary relations with additional classes in OWL
1,219 views0 comments
Michael DeBellis
Oct 15, 20193 min read
OWL Best Practices: Using Enumerated Classes to Define Ordered Values
Describes a design pattern for representing qualitative values (e.g., low, medium, high) as an enumerated class and transitive properties
2,864 views1 comment
Michael DeBellis
Oct 10, 20192 min read
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
3,426 views0 comments
Michael DeBellis
Oct 4, 20193 min read
Protege Best Practices: Export Inferred Axioms
How to save reasoner inferences in an OWL file
3,014 views2 comments
Michael DeBellis
Sep 12, 20193 min read
SWRL Tip: Removing Ontology Prefixes from SWRL rules
How to remove ontology prefixes for the base ontology from SWRL rules
942 views0 comments
bottom of page