May 4th, 2016 - This version of OLS is deprecated, please use the new site at http://www.ebi.ac.uk/ols. We will continue to provide access to this service at http://www.ebi.ac.uk/ols/v2 until October 2016, however, the underlying database is no longer being updated. This service will be removed entirely from October 2016. We apologies in advance for any inconvenience caused, if you have any questions please contact us on ols-support [at] ebi.ac.uk.
The Ontology Lookup Service is a spin-off of the
PRIDE project, which required a
centralized query interface for ontology and controlled vocabulary
The OLS provides a web service interface to query multiple ontologies
from a single location with a unified output format.The OLS can integrate any ontology available in
the Open Biomedical Ontology (OBO) format.
||Tue May 03 15:32:13 BST 2016
See the full breakdown of loaded ontologies here
and load statistics here.
The OLS is an open source project hosted on Google Code. You can access
the OLS project page,
or browse the SVN
External collaborators have provided an R package to connect to and query the OLS. It is available
described on the bioconductor
The OLS software and the SOAP webservice are both freely available for use for all users, academic or
commercial, under the terms of the
Apache License, Version
2.0. If you find them useful for
your own applications, we would be grateful for a mention similar to the following:
"Uses the EBI
where both the image and URL are hyperlinked to the OLS homepage.
OLS SOAP Demo client (java): ols-client.tar.gz
A weekly MySQL database export file can be downloaded from the EBI public FTP directory.
Instructions on how obtain, install and use the export file can be found on the
MySQL database export documentation
OLS is supported through BBSRC iSPIDER.
Hosted by Google Code