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@ad-freiburg

University of Freiburg: Algorithms and Data Structures Group

Code from our various research projects and publications

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  1. qlever qlever Public

    Graph database implementing the RDF and SPARQL standards. Very fast and scales to more than a trillion triples on a single commodity machine

    C++ 713 103

  2. aqqu aqqu Public

    More Accurate Question Answering on Freebase

    Python 107 36

  3. completesearch completesearch Public

    Search engine for semi-structured data (text and structured data) that provides all kinds of intelligent search features (keyword search, autocompletion, faceted search, error-tolerant search, syno…

    C++ 26 7

  4. pfaedle pfaedle Public

    Precise map-matching for public transit feeds. Generates high-quality GTFS shapes from OSM data.

    C++ 261 35

  5. large-qa-datasets large-qa-datasets Public

    A collection of large question answering datasets

    428 44

  6. pdfact pdfact Public

    A basic tool that extracts the structure from the PDF files of scientific articles.

    Java 76 11

Repositories

Showing 10 of 72 repositories
  • grasp Public

    GRASP: Generic Reasoning and SPARQL generation across Knowledge Graphs

    ad-freiburg/grasp’s past year of commit activity
    Python 11 Apache-2.0 4 0 0 Updated Dec 9, 2025
  • qlever Public

    Graph database implementing the RDF and SPARQL standards. Very fast and scales to more than a trillion triples on a single commodity machine

    ad-freiburg/qlever’s past year of commit activity
    C++ 713 Apache-2.0 103 168 96 Updated Dec 9, 2025
  • sparql-conformance Public

    SPARQL test suite (https://www.w3.org/2009/sparql/docs/tests/) for QLEVER (https://github.com/ad-freiburg/qlever)

    ad-freiburg/sparql-conformance’s past year of commit activity
    Python 2 4 7 1 Updated Dec 8, 2025
  • scholia Public Forked from WDscholia/scholia

    Wikidata-based scholarly profiles

    ad-freiburg/scholia’s past year of commit activity
    JavaScript 0 GPL-3.0 90 7 6 Updated Dec 8, 2025
  • spatialjoin Public

    Compute spatial self-joins (on intersects, contains, covers, touches, crosses, overlaps, equals) on large collections of WKT geometries. Can handle the complete OSM data as input.

    ad-freiburg/spatialjoin’s past year of commit activity
    C++ 5 2 0 1 Updated Dec 5, 2025
  • util Public

    Small library of utility functions

    ad-freiburg/util’s past year of commit activity
    C++ 0 1 0 0 Updated Dec 5, 2025
  • sparql-conformance-ui Public

    website to visualize the conformance results of the qlever engine.

    ad-freiburg/sparql-conformance-ui’s past year of commit activity
    JavaScript 1 0 0 0 Updated Dec 3, 2025
  • sparql-conformance-uploader Public
    ad-freiburg/sparql-conformance-uploader’s past year of commit activity
    JavaScript 0 0 0 0 Updated Dec 1, 2025
  • loom Public

    Software suite for the automated generation of geographically correct or schematic transit maps.

    ad-freiburg/loom’s past year of commit activity
    C++ 228 GPL-3.0 25 10 0 Updated Dec 1, 2025
  • ad-blog Public

    AD Blog Posts (currently: student project reports)

    ad-freiburg/ad-blog’s past year of commit activity
    HTML 0 40 1 4 Updated Nov 26, 2025
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