Web Data Integration (HWS2018)

Data integration is one of the key challenges within most IT projects. Within the enterprise context, data integration problems arise whenever data from separate sources needs to be combined as the basis for new applications or data analysis projects. Within the context of the Web, data integration techniques form the foundation for taking advantage of the ever growing number of publicly-accessible data sources and for enabling applications such as product comparison portals, job portals, location-based mashups, or data search engines.

In the course, students will learn techniques for integrating and cleansing data from large sets of heterogeneous data sources. The course will cover the following topics:

  1. Heterogeneity and Distributedness
  2. The Data Integration Process
  3. Structured Data on the Web
  4. Data Exchange Formats
  5. Schema Mapping and Data Translation
  6. Identity Resolution
  7. Data Quality Assessment
  8. Data Fusion

The course consists of a lecture as well as accompanying practical projects. The lecture covers the theory and methods of web data integration and is concluded by a written exam (3 ECTS). In the projects, students will gain experience with web data integration methods by applying them within a real-world use case of their choise. Students will work on their projects in teams and will report the results of their projects in the form of a written report as well as an oral presentation (together 3 ECTS). While the lecture and the project can be attended in seperate years, it is highly recommended to attend both in the same semester as the schedule of the lecture and project are aligned to each other.


Time and Location

  • Wednesday, 15:30-17:00. Building: B6, Room: A 101 (Starting: 5.9.2018)
  • Thursday, 10:15-11:45. Building: B6, Room: A 101 (Starting: 6.9.2018)



  • 3 ECTS: Lecture with written exam
  • 3 ECTS: Project with report and presentation


  • The slide sets will be published here at the beginning of the semester.

Lecture Videos

  • Video recordings of the Web Data Integration lectures from HWS2015 are available here.


Week Wednesday Thursday
5.9.2018 Lecture: Introduction to Web Data Integration Lecture: Structured Data on the Web
12.9.2018 Lecture: Data Exchange Formats Lecture: Data Exchange Formats
19.9.2018 Lecture: Schema Mapping Lecture: Schema Mapping
26.9.2018Project: Introduction to Student Projects Project: Introduction to MapForce
3.10.2018- Holiday - Project: Feedback about Project Outlines
10.10.2018 Project Work: Data Translation Project Work: Data Translation
17.10.2018 Lecture: Identity Resolution Lecture: Identity Resolution
24.10.2018 Project: Identity Resolution Project Work:Identity Resolution
31.10.2018 Project Work: Identity ResolutionProject Work: Identity Resolution
7.11.2017 Lecture: Data Quality and Data Fusion Lecture: Data Quality and Data Fusion
14.11.2017 Project: Data FusionProject Work: Data Fusion
21.11.2017 Project Work: Data Fusion  Project Work: Data Fusion
28.11.2017Project Work: Data Fusion Project Work: Data Fusion
5.12.2017 Presentation of project results Presentation of project results

Registration and Participation

  • The lecture and the projects are open to students of the Mannheim Master in Data Science and Master Business Informatics.
  • The lecture is not restricted on the number of participants.
  • The projects are restricted to altogether 60 participants.
  • Registration for the projects will be opened Wednesday, August 29th 2018, 10:15 am.
  • Registration for the projects  is done via Portal2.


  • Programming skills in Java are required for the projects.

Course Evaluation 



  1. AnHai Doan, Alon Halevy, Zachary Ives: Principles of Data Integration. Morgan Kaufmann, 2012.
  2. Ulf Leser, Felix Naumann: Informationsintegration. Dpunkt Verlag, 2007. (Free PDF Version)
  3. Luna Dong, Divesh Srivastava: Big Data Integration. Morgan & Claypool, 2015.
  4. Serge Abiteboul, et al: Web Data Management. Cambridge University Press, 2012.
  5. Jérôme Euzenat, Pavel Shvaiko: Ontology Maching. Springer, 2007.
  6. Felix Naumann: An Introduction to Duplicate Detection. Morgan & Claypool, 2012.
  7. Peter Christen: Data Matching - Concepts and Techniques for Record Linkage, Entity Resolution, and Duplicate Detection. Springer, 2012.