centrally registered identifier symbol source database Database that originally provided the interaction record for exchange purposes. PMID:14755292 Damion Dooley's note: GenEpiO is using members of this class for the first part of the hasDbXref relation. This is where we are keeping the mapping between a code and its source database. Depending on its context, hasDbXref annotations may point directly to metadata field names in the target database, and may be annotated with additional information that guides any additional specifications that impact on data conversion of these fields. data source http://www.ontobee.org/ontology/MI ready for release