University of Freiburg: Algorithms and Data Structures Group

Code from our various research projects and publications

70 followers
Freiburg im Breisgau, Germany
https://ad.informatik.uni-freiburg.de/front-page-en?set_language=en
bast@informatik.uni-freiburg.de

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qleverqleverPublic
Very fast SPARQL Engine, which can handle very large knowledge graphs like the complete Wikidata, offers context-sensitive autocompletion for SPARQL queries, and allows combination with text search…
C++ 521 66
aqquaqquPublic
More Accurate Question Answering on Freebase
Python 107 36
completesearchcompletesearchPublic
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++ 20 5
pfaedlepfaedlePublic
Precise map-matching for public transit feeds. Generates high-quality GTFS shapes from OSM data.
C++ 222 31
large-qa-datasetslarge-qa-datasetsPublic
A collection of large question answering datasets
367 38
pdfactpdfactPublic
A basic tool that extracts the structure from the PDF files of scientific articles.
Java 73 11

Repositories

Showing 10 of 64 repositories

qlever-control Public
ad-freiburg/qlever-control’s past year of commit activity
Python 39Apache-2.0 18 29 12 UpdatedMar 16, 2025
osm2rdf Public
Convert OpenStreetMap (OSM) data to RDF Turtle, including the object geometries and predicates ogc:sfContains, ogc:sfCovers, ogc:sfIntersects, ogc:sfTouches, ogc:sfCrosses, ogc:sfEquals, and ogc:sfOverlaps. Weekly updated downloads for the whole planet (~ 80 billion triples) and per country.
ad-freiburg/osm2rdf’s past year of commit activity
C++ 25GPL-3.0 8 10 6 UpdatedMar 15, 2025
qlever Public
Very fast SPARQL Engine, which can handle very large knowledge graphs like the complete Wikidata, offers context-sensitive autocompletion for SPARQL queries, and allows combination with text search. It's faster than engines like Blazegraph or Virtuoso, especially for queries involving large result sets.
ad-freiburg/qlever’s past year of commit activity
C++ 521Apache-2.0 66 118 52 UpdatedMar 13, 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++ 30 0 2 UpdatedMar 13, 2025
util Public
Small library of utility functions
ad-freiburg/util’s past year of commit activity
C++00 0 1 UpdatedMar 13, 2025
qlever-ui Public
A user interface for QLever
ad-freiburg/qlever-ui’s past year of commit activity
JavaScript 32Apache-2.0 18 36 (1 issue needs help) 7 UpdatedMar 12, 2025
text-utils Public
Text utilities for Deep NLP
ad-freiburg/text-utils’s past year of commit activity
Rust 5Apache-2.0 1 1 0 UpdatedMar 6, 2025
elevant Public
Entity linking evaluation and analysis tool
ad-freiburg/elevant’s past year of commit activity
Python 20Apache-2.0 1 1 0 UpdatedFeb 26, 2025
pfaedle Public
Precise map-matching for public transit feeds. Generates high-quality GTFS shapes from OSM data.
ad-freiburg/pfaedle’s past year of commit activity
C++ 222GPL-3.0 31 10 2 UpdatedFeb 25, 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++ 166GPL-3.0 18 10 0 UpdatedFeb 13, 2025