Presentation

In this tutorial, we will see how to design a Virtual Knowledge Graph (VKG) specification, how to deploy it as a SPARQL endpoint, how to consume it and further more advanced topics.

Requirements

• Java 11 (opens new window)
• Latest version of Ontop from GitHub (opens new window) or SourceForge (opens new window)
• H2 with preloaded datasets h2.zip
• Git (opens new window)

Clone this repository

Before start, please clone this repository in order to download all the files

git clone https://github.com/ontop/ontop-tutorial.git
cd ontop-tutorial

Program

1. Basics of VKG Modeling
   • Mapping the first data source
   • Mapping the second data source
2. Deploying an Ontop SPARQL endpoint
   • Using Ontop CLI
   • Using Ontop Docker image
3. Interacting with an Ontop SPARQL endpoint
   • Command Line Tools (curl, http)
   • Python and Jupyter Notebook
4. Mapping Engineering
   • Role of primary keys
   • Role of foreign keys
   • Choice of the URI templates
   • Bonus: existential reasoning
5. Materialization using Ontop
   • How to materialize data into a graph database using Ontop
6. Federating multiple databases
   • Ontop with Dremio
   • Ontop with Denodo
7. Lenses
   • Basic Lens
   • Join Lens
   • SQL Lens
   • Union Lens
   • Flatten Lens
8. External tutorials