Knowledge graphs

Introduction

Semantic web tutorial

Owl web ontology language

Webinars

There are a number of webinars by Jesus Barrasa which are very helpful. Some of them are very helpful to connect the dots between RDF graphs, ontologies and LPG graphs (which is what neo4j uses).

And some lectures from Jesus Barrasa again on ontologies/rdf and neo4j:

SPARQL tutorial

Python based semantic web

Reasoning and inferencing

To understand a bit more on reasoning and inferencing there are some YouTube videos:

OntoCape ontololgy