The Closure of 500M owl:sameAs Statements

Wouter Beek, Joe Raad*, Jan Wielemaker, Frank van Harmelen

*Corresponding author for this work

Research output: Chapter in Book / Report / Conference proceedingConference contributionAcademicpeer-review

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The owl:sameAs predicate is an essential ingredient of the Semantic Web architecture. It allows parties to independently mint names, while at the same time ensuring that these parties are able to understand each other’s data. An online resource that collects all owl:sameAs statements on the Linked Open Data Cloud has therefore both practical impact (it helps data users and providers to find different names for the same entity) as well as analytical value (it reveals important aspects of the connectivity of the LOD Cloud). This paper presents the largest dataset of identity statements that has been gathered from the LOD Cloud to date. We describe an efficient approach for calculating and storing the full equivalence closure over this dataset. The dataset is published online, as well as a web service from which the data and its equivalence closure can be queried.

Original languageEnglish
Title of host publicationThe Semantic Web - 15th International Conference, ESWC 2018, Proceedings
Number of pages16
ISBN (Electronic)9783319934174
ISBN (Print)9783319934167
Publication statusPublished - 2018
Event15th International Conference on Extended Semantic Web Conference, ESWC 2018 - Heraklion, Greece
Duration: 3 Jun 20187 Jun 2018

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume10843 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349


Conference15th International Conference on Extended Semantic Web Conference, ESWC 2018


  • Identity
  • Linked Open Data
  • Reasoning


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