UBY – A Large-Scale Unified Lexical-Semantic Resource

UBY is a large-scale lexical-semantic resource for natural language processing (NLP) based on the ISO standard Lexical Markup Framework (LMF). UBY combines a wide range of information from expert-constructed and collaboratively constructed resources for English and German. Currently, UBY integrates 12 resources in two languages by linking them pairwise at the word sense level:

English WordNet, Wiktionary, OntoWiktionary, Wikipedia, FrameNet and VerbNet,

German Wikipedia, Wiktionary, OntoWiktionary, GermaNet and IMSLex-Subcat, and multilingual OmegaWiki.

Most UBY related software is developed open source on GitHub.

We offer UBY databases with open resources for download:

There is also a Semantic Web version of UBY called lemonUby, created in collaboration with John McCrae (CITEC, Universität Bielefeld) and Christian Chiarcos (ACoLi, Goethe-University Frankfurt am Main). Find out more on the lemonUby website.


  • UBY Tutorial at TU Darmstadt, May 2015 (Slides), Tutorial Code
  • UBY Tutorial at GSCL 2013 (Slides), Tutorial Code


We provide a commented list of selected UBY related publications on the Publications page.


UBY contains interoperable lexicons represented in a standard-compliant format called UBY-LMF.

Visual Browser

The UBY Web Interface is currently being revised. Find out more about the redesign of the visualization component – the Visual Browser.


In alphabetical order:

  • Michael Bugert, Doctoral Researcher
  • Dr. Richard Eckart de Castilho, Senior Researcher
  • Dr. Judith Eckle-Kohler, Senior Researcher
  • Prof. Dr. Iryna Gurevych, Principal Investigator
  • Masoud Kiaeeha, Doctoral Researcher
  • Dr. Christian M. Meyer, Senior Researcher
  • Dr. Tristan Miller, Postdoctoral Researcher
  • Dr. Hatem Mousselly-Sergieh, Postdoctoral Researcher
  • Daniil Sorokin, Doctoral Researcher

Former members:

  • Yevgen Chebotar
  • Dr. Kostadin Cholakov
  • Dr. des. Silvana Hartmann
  • Mohamed Khemakhem
  • Zijad Maksuti
  • Dr. Michael Matuschek
  • Tri-Duc Nghiem
  • Christian Wirth
  • Than-Le Ha