Meeting notes, etc.: https://docs.google.com/spreadsheets/d/1LvoWFUuum93yPZtQC-cm__2woM2mJwAgdD4ZBnVI-Uc/edit#gid=1194089826
Course link: https://open.hpi.de/courses/knowledgegraphs2020
Week 1: Knowledge Graphs in the Web of Data
- Meeting date: March 12, 2021
Week 2: Basic Semantic Technologies
- Meeting date: March 19, 2021
- Demo/Share-out: Find examples of RDFa/Turtle syntax in the wild or from work
- Food Ontology OWL syntax
- Food Ontolgoy Turtle syntax
- TerminusDB uses query function relying on Prolog, based on first order logic
Week 3: Querying RDF with SPARQL
- Meeting date: March 26, 2021
- Demo: SPARQL query examples!
- DBpedia SPARQL endpoint
- Wikidata SPARQL endpoint
- Step-by-step instructions for setting up Virtuoso
- Querying Wikidata with SPAQRL for Absolute Beginners (Youtube)
- Marcelo Barbieri's helpful medium posts
Week 4: Knowledge Representation with Ontologies
- Meeting date: April 2, 2021
- Demo: Glenn will share drafted media ontology; Bob will give overview of OWL.
Week 5: Knowledge Graph Applications
- Meeting date: April 9, 2021
- Demo: TBD
Week 6: Advanced Knowledge Graph Applications
- Meeting date: April 16, 2021
- Demo: TBD
What we'll cover next
- Deep dive on semantic web tool (Bob)
- More TBD!
P. Hitzler, M. Krötzsch, S. Rudolph: Foundations of Semantic Web
Technologies, CRC Press, 2009.
https://www.semantic-web-book.org/index.html
T. Heath, Ch. Bitzer: Linked Data - Evolving the Web into a Global Data
Space, Morgan & Claypool, 2011.
- excellent beginner tutorial as moves quickly through basics with no confusing pre-amble
- interactive: allows running queries as part of the tutorial against data.world resources
- does not cover relationship to SQL or describe why certain design decisions were made (e.g. why not keep the syntax more similar to SQL?)
Apache Jena SPARQL Tutorial: more clunky than the first, but moves into more detail of functions such as FILTER
StarDog Tutorials
- provides data for free
- examples can be performed in Jena or Rasqal locally (using the sparql or roqet command line utilities to query the data files directly
- Need to add the PREFIXes to the queries (at least the standard rdf and rdfs):
- also can use https://stardog.studio for free, datasets already loaded
- Tutorial 1 has examples of how to accomplish in SQL; starts off with heavy queries, to show example outputs, and then dissects.
- OWL Tutorial: New Protege Pizza Tutorial
- OWL Tutorial: OWL 101
Awesome Semantic Web: A wonderful curated list of semantic/linked data resources:
https://github.com/semantalytics/awesome-semantic-web/blob/master/README.md