Nordlys: Toolkit for entity-oriented and semantic search
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www Web Jun 30, 2017
LICENSE Update Aug 3, 2017
requirements.txt Update requirements.txt Jan 5, 2018


Entities (such as people, organizations, or products) are meaningful units for organizing information and can provide direct answers to many search queries. Nordlys is a toolkit for entity-oriented and semantic search.


Nordlys currently supports four entity-oriented tasks, which are core components in semantic search:

  • Entity cataloging
  • Entity retrieval
  • Entity linking in queries
  • Target type identification


  • General-purpose information retrieval and machine learning components at its core
  • Implementations of various methods for the above entity-oriented search tasks (with more on their way)
  • Based on the DBpedia knowledge base (extendible to other knowledge bases)
  • Can used as a black box through a RESTful API
  • Can be reached via a graphical web user interface
  • Can be deployed on a local server and used as a Python package or as a command line tool
  • Highly modular and well documented code, based on a 3-tier architecture
  • Open source project that is actively being developed


Nordlys is not (yet) a mature production-level system, but rather a research prototype (as can be seen from the current version number, which is v0.2). We welcome contributions on all levels (pull requests, suggestions for improvements, feature requests, etc.).


Faegheh Hasibi, Krisztian Balog, Dario Garigliotti, Shuo Zhang