Guide to Ontologies
A beginner-friendly introduction to ontologies, their formats, syntaxes, and the vocabularies that power the Semantic Web.
1
What is an Ontology?
Learn what ontologies are, why they matter, and how they power the Semantic Web.
2
What are the Types of Ontologies?
Explore the spectrum from lightweight taxonomies to heavyweight formal ontologies.
3
What are the Ontology Formats?
Understand RDF serialization formats like Turtle, RDF/XML, JSON-LD, and more.
4
What is an Ontology Syntax?
Compare Manchester Syntax, Functional Syntax, OWL/XML, and Turtle for expressing OWL.
5
What is an Ontology Vocabulary?
Discover standard vocabularies like RDFS, Dublin Core, SKOS, FOAF, and Schema.org.
6
What are Properties?
From the base rdf:Property to OWL's three property kinds, characteristic axioms (functional, transitive, …), and disjointness.