Open Concept Lab is an open-source terminology management system
OCL provides real-time electronic access to terminological resources and straightforward integration with independent software platforms.
OCL Online helps you to collaboratively manage, publish, and use terminology in the cloud alongside the global community.

Blog
OCL Search Improvements: Enhancing Precision and User Experience
This blog is written by Sunny Aggarwal. Sunny is a Python Developer in the Open Concept Lab (OCL) team. He has been working as a core contributor in OCL for many years now and currently leads the OCL software tools enhancement work. Introduction In this blog post, we will explore the recent...
What’s The Latest with National Health Data Dictionaries? (NHDDs)
Did you know that OCL participated in the 2023 OpenHIE Community Meeting (#OHIE23)? This meeting was attended by 280 digital health professionals from across 33 different countries. At #OHIE23 there were several unconference (participant-led) sessions on many different health information exchange...
Coming in 2024 – OCLv3: The first step towards Smart Dictionaries
This blog is written by Joe Amlung. Joe is a Technical Advisor for the Regenstrief Institute’s Global Health Informatics team. He has focused on terminology management for several years, particularly by working with the Open Concept Lab (OCL) tools and the OpenMRS and OpenHIE Terminology Services...
Join the OCL Mailing List
OCL Features
Open Source
Cloud Based
Community Driven
Standards Based
LMIC Focused
Featured Projects

Ethiopia NHDD
The National Health Data Dictionary (NHDD) captures the definitions of data elements, indicators, and the relationships between these elements to improve the MOH’s ability to manage data recording and reporting guidelines and to harmonize data across many stakeholders.

Columbia International eHealth Laboratory
The Columbia International eHealth Laboratory (CIEL) dictionary is a shared open concept dictionary.

PEPFAR DATIM
The Metadata Sharing Platform (MSP) was launched in 2020 to provide users within the U.S. President’s Emergency Plan for AIDS Relief (PEPFAR) data exchange and interoperability community access to metadata for indicators defined in the Monitoring, Evaluation, and Reporting (MER) Indicator Reference Guide.