The Ontology Summit is an annual series of events that involves the
ontology engineering community as well as other communities related to each
year's theme chosen for the summit.  The theme for 2021 is

*Ontology Generation and Harmonization*

Ontologies are rich and versatile engineering artifacts. They can be
extracted, learned, modularized, interrelated, transformed, analyzed, and
harmonized as well as developed in a formal process.  The Ontology Summit
2021 is exploring the many kinds of ontologies and how they can be
manipulated.  The summit consists of four tracks:

Track A: The Ontological Landscape
Track B: Definitions
Track C: Neuro-Symbolic Learning Ontologies
Track D: Sustainability of Ontologies

The Ontology Summit is free and open to the public.  No registration is
required.  All sessions are Zoom meetings on Wednesdays at Noon U.S./Canada
Eastern Time.  The Ontology Summit 2021 has already started, but every
session is self-contained.  The sessions are recorded, and the recordings
and slide presentations are publicly available.

To attend the meetings please see the information on the Ontology Summit
2021 Website at where one can find the schedule.