In Powersheet, the YAML file defining entity types and relationships is called the data model (formerly “domain model”). “Entity type” refers to data model concepts; “work item type” refers to the underlying Polarion type.
Data Model Basics
What is a data model and why do I need one?
Entity Types and Properties
How do I define entity types in the data model?
Relationships and Cardinality
What relationship cardinalities are supported?
Configuration Tips
Should I start with a complex or simple data model?