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Logo: Institut für Verteilte Systeme - Fachgebiet Wissensbasierte Systeme (KBS)
Logo Leibniz Universität Hannover
Logo: Institut für Verteilte Systeme - Fachgebiet Wissensbasierte Systeme (KBS)
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Foundations of Information Retrieval

Prof. Wolfgang Nejdl, Sergej Wildemann


The lecture gives an introduction to Web Information Retrieval with particular emphasis on the algorithms and technologies used in the modern search engines.
The module covers an introduction to the traditional text IR, including Boolean retrieval, vector space model as well as tolerant retrieval. Afterwards, the technical basics of Web IR are discussed, starting with the Web size estimation and duplicate detection followed by the link analysis and crawling. This leads on to the study of the modern search engine evaluation methods and various test collections. Finally, applications of classification and clustering in the IR domain are discussed. The theoretical basis is illustrated by the examples of the modern search systems, such as Google, Altavista, Clusty, etc.

Die Lehrveranstaltung behandelt Algorithmen, Strukturen und innovative Systeme, die im Rahmen des World Wide Web relevant sind bzw. durch das World Wide Web möglich geworden sind. Kernpunkte der Lehrveranstaltung sind Web-Suche (Web Crawling, Text Indexing, Ranking Mechanismen), Analyse und Struktur des World Wide Web, Datenmanagement (Suche, Topologien, Systeme), sowie weitere aktuelle Themen.

Recommended Literature:

Christopher D. Manning, Prabhakar Raghavan and Hinrich Schütze, Introduction to Information Retrieval, Cambridge University Press. 2008.


Computer science students (recommended from the 3. semester) and ITIS students.


Sergej Wildemann, M.Sc.



 Lecture Dates

The lecture and exercise sessions in WS 2019/20 take place in the Multimedia-Room, Appelstr. 4, Thursday 11:30 - approx. 14:00 (starting October 17, 2019).

The lectures will not be recorded.


The summer semester 2020 exam will take place on Wednesday 29.07.2020 from 9:00 to 11:00 in rooms 3703-023 (MMH) and 3702-031 (LFI). Please arrive at room 3703-023 and bring a mask.

The exam will be in English. You can answer in English or German. All topics discussed in the lectures, exercises and programming exercises are relevant.

Duration: 90 minutes.
Auxiliary material: a non-programmable calculator, dictionary. 

Lecture notes:

WS 2019/20

Archive of the lectures "Foundations of Information Retrieval" and "Technologien für das Internet I":