Knowledge Graphs

From International Center for Computational Logic

Knowledge Graphs

Course with SWS 2/2/0 (lecture/exercise/practical) in WS 2020

Knowledge graphs are becoming an important paradigm in industry and research, with applications including prominent examples such as Google's own Knowledge Graph, Wikipedia's knowledge base sister Wikidata, and numerous artificial intelligence projects from Alexa to Siri. Meanwhile, companies are exploring the use of their own enterprise knowledge graphs for improving internal knowledge management.

With so many facets, knowledge graphs are a cross-cutting topic in computer science that involves aspects of data management (graph databases, file formats), publication (exchange formats, data integration), knowledge organisation (constraints, ontologies), and advanced analytics (expressive query languages, graph data mining). On each of these levels, there is some interesting theory and some interesting technology to be learned. This course will cover a colourful mix of technologies and methods related to the use of graphs for data analysis, knowledge representation, and data management.

Registration

The course generally does not require a special registration and there is no limit for participants. However, students in programmes that use the Selma system (esp. students in CMS Master) will need to register there to obtain credits. Additionally, we kindly ask you to enroll in the OPAL course so we can contact you, should the need arise. Most of the materials will be freely available world-wide. Live sessions (especially tutorials) are restricted to students of TU Dresden. Information on how to join will be published through the OPAL page of this course, which students of TU Dresden can access.

Schedule and Location

During the winter term 2020/21, the lecture and tutorials will be held online.

All dates are published on this page (see Dates & Materials above)

  • Lecture sessions: Tuesdays DS2 (09:20 to 10:50), not every week; see dates published here, in Zoom (see below)
  • Exercise session: DS3 (11:10 to 12:40)
  • The first exercise session will take place on Tuesday, 2020-11-03.
  • A Q&A session will take place on Friday, 2021-02-26, during DS2 (09:20 to 10:50), in Zoom (see below), where we will discuss the mock exam.
  • A second Q&A session will take place on Monday, 2021-03-15, during DS4 (13:00 to 14:30), in Zoom (see below).

All sessions will take place online. Links to the respective video rooms will be published through the OPAL page of this course. Sessions for larger numbers of participants are conducted in Zoom; participants can use the link provided in the Links section in OPAL.

A discussion forum on the OPAL page of this course and a Matrix chat room for discussions are available. Selected material is published in a GitHub repository.

Exam

Due to the COVID-19 situation, the exam will be a written online exam, using the ONYX platform. This applies to all modules, including those that would normally have an oral examination. We will send out detailed instructions via email to all students regiestered in OPAL. The only exception are modules INF-PM-FOR and INF-PM-ANW, where the examination will be as usual (ungraded, 15min oral); students in these modules should contact us to get a topic and date for their 15min exam.

The written exam will take place on Tuesday, 2021-03-16, from 09:20 to 10:20 (login is possible from 08:50 on). We will conduct a mock exam on Tuesday, 2021-02-23, from 11:30 to 12:30.

All students have to register according to the usual procedures in their course:

  • CMS students register using Selma
  • MCL students follow the usual procedures for registration
  • INF-B510/INF-B520 students follow the usual procedures for registration
  • all other students follow these procedures
The deadline for registrations is Sunday, 2021-01-24. Please keep in mind that unless you register via Selma, you need to contact us to complete the registration.

Subscribe to events of this course (icalendar)

Lecture 1. Introduction and Welcome DS2, October 27, 2020 in Zoom File
Video
Lecture 2. The Resource Description Framework RDF DS2, November 3, 2020 in Video File
Video 1 Video 2 Video 3
Exercise 0. Introduction to Python DS3, November 3, 2020 in (online) File
Lecture 3. Modelling in RDF / SPARQL Basics DS2, November 10, 2020 in Video File
Video 1 Video 2 Video 3
Exercise 1. Getting to Know Graphs and RDF DS3, November 10, 2020 in Video conference File
Lecture 4. Wikidata DS2, November 17, 2020 in Video File
Video 1 Video 2 Video 3
Exercise 2. RDF Modelling DS3, November 17, 2020 in Video conference File
Lecture 5. Advanced Features of SPARQL DS2, November 24, 2020 in Video File
Video 1 Video 2 Video 3
Exercise 3. SPARQL and Wikidata DS3, November 24, 2020 in Video conference File
Lecture 6. SPARQL Semantics DS2, December 1, 2020 in Video File
Video 1 Video 2 Video 3
Exercise 4. More SPARQL and Wikidata DS3, December 1, 2020 in Video conference File
Lecture 7. Expressive Power and Complexity of SPARQL DS2, December 8, 2020 in Video File
Video 1 Video 2 Video 3
Exercise 5. Advanced SPARQL DS3, December 8, 2020 in Video conference File
Lecture 8. Limits of SPARQL / Datalog DS2, December 15, 2020 in Video File
Video 1 Video 2
Exercise 6. More Advanced SPARQL DS3, December 15, 2020 in Video conference File
Lecture 9. Rules for Querying Graphs DS2, January 5, 2021 in Video File
Video 1 Video 2
Exercise 7. Expressivity of SPARQL DS3, January 5, 2021 in Video conference File
Lecture 10. Property Graph DS2, January 12, 2021 in Video File
Video 1 Video 2 Video 3
Exercise 8. Datalog & Rulewerk DS3, January 12, 2021 in Video conference File
Lecture 11. Querying Property Graphs with Cypher DS2, January 19, 2021 in Video File
Video 1 Video 2
Exercise 9. Datalog, Rulewerk, and Property Graph DS3, January 19, 2021 in Video conference File
Lecture 12. Knowledge Graph Quality DS2, January 26, 2021 in Video File
Video 1 Video 2
Exercise 10. Cypher DS3, January 26, 2021 in Video conference File
Lecture 13. Centrality DS2, February 2, 2021 in Video File
Video 1 Video 2 Video 3
Exercise 11. Knowledge Graph Quality and Validation DS3, February 2, 2021 in Video conference File
Exercise 12. Centrality Measures DS3, February 9, 2021 in Video conference File
Consultation Questions & Answers: mock exam DS2, February 26, 2021 in (online) File
Consultation Questions & Answers DS4, March 15, 2021 in (online)


Calendar