Ontology Alignment Evaluation Initiative - OAEI-2020 CampaignOAEI OAEI

Conference track

Conference track contains 16 ontologies from the same domain (conference organization). These ontologies are suitable for ontology matching task because of their heterogenous character of origin. An evaluation process will be supported by SEALS platform, see section below for list of planned evaluation methods. Seven ontologies are involved in the reference alignment: Cmt, ConfTool, Edas, Ekaw, Iasted, Sigkdd, Sofsem.


Results will be available according to OAEI schedule.

Data set

Data set is available from this web-page (see below). You can either download them and try them on your own or you can directly use SEALS platform. Both options are possible, however finally you have to wrap your tool against the SEALS client provided via the OAEI main page and run this client against the Conference testsuite. For running the Conference testsuite you will have to specify the following input parameters:

Conference Testsuite

The collection of ontologies is dealing with conference organization. They have been developed within OntoFarm project. 16 ontologies are included; the last one (linklings.owl) is in the OWL 2 profile. Each of them is shortly described in the following table. Ontologies have been based upon three types of underlying resources:

Name is derived from name of conference or conference organisation tool. For downloading this ontology, just click on its name or you can download all ontologies at once.
DL expressivity was obtained by Pellet reasoner.

NameTypeNumber of ClassesNumber of Datatype Properties Number of Object PropertiesDL expressivityRelated link

These ontologies are in English. Based on this collection multilingual collection MultiFarm have been made and included into the OAEI campaign as MultiFarm track. Further, three ontologies (Cmt, Ekaw and Sofsem) from this track has been added into the complex matching track.


Participants will use SEALS platform to deliver their results. Alignments submitted via SEALS platform will be evaluated based on

Further, this year we plan to provide detail analysis in the following two ways

The confidence values for all matches in the crisp reference alignment are 1.0, while the uncertain version of the reference alignment has confidence values that reflect the degree of agreement of a group of twenty people on the validity of the match. Crisp reference alignment contains 21 alignments (test cases), which corresponds to the complete alignment space between 7 ontologies (Cmt, ConfTool, Edas, Ekaw, Iasted, Sigkdd, Sofsem) from the data set. This is a subset of all ontologies within this track (16). Total number of possible test cases is hence 120. There are three variants of reference alignment:

Furthermore, participants can directly submit their 'interesting individual correspondences' ('nuggets') which could represent complex correspondences to organizers of this conference track, for contacts please see below. These correspondences will be evaluated manually.


The schedule is available at the OAEI main page.



[1] Michelle Cheatham, Pascal Hitzler: Conference v2.0: An Uncertain Version of the OAEI Conference Benchmark. International Semantic Web Conference (2) 2014: 33-48.

[2] Alessandro Solimando, Ernesto Jiménez-Ruiz, Giovanna Guerrini: Detecting and Correcting Conservativity Principle Violations in Ontology-to-Ontology Mappings. International Semantic Web Conference (2) 2014: 1-16.

[3] Alessandro Solimando, Ernesto Jiménez-Ruiz, Giovanna Guerrini: Minimizing conservativity violations in ontology alignments: algorithms and evaluation. Knowl. Inf. Syst. 51(3): 775-819 (2017)

[4] Ondřej Zamazal, Vojtěch Svátek. The Ten-Year OntoFarm and its Fertilization within the Onto-Sphere. Web Semantics: Science, Services and Agents on the World Wide Web, 43, 46-53. 2017.