Fig. 3
From: OMeta: an ontology-based, data-driven metadata tracking system
Relationship of Core Objects and Examples. The core entities of OMeta are Project, Sample, and Event. Event are defined for project or sample attributes, and after successful transaction data is stored in event, event_attribute, sample_attribute, and project_attribute table. Examples of these are in grey boxes. These represent multiple events loaded (Project Registration, Sample Registration, and SRA submission) and how data is persistent in Project_attribute and Sample_attribute entities