Hi! My name is John Graybeal, I am a Technical Program Manager for some semantic services at the Stanford Center for Biomedical Informatics Research: BioPortal (a semantic repository some of you may have heard of) and CEDAR Workbench, a semantic metadata modeling and collection and management system.
I work on a few metadata interoperability projects that touch OHDSI space, and watching the work of colleagues in BMIR who have been doing more direct analyses related to OHDSI data. One of my key interests is in connecting the semantics of OHDSI to the semantics of other systems and of the semantic web (read: OWL, RDF, and other similar artifacts).