This is an application of an engineering term to a product-level concept, but it fits. I guess you'd say "domain model" in product-speak, but to my engineering

This is an application of an engineering term to a product-level concept, but it fits. I guess you'd say "domain model" in product-speak, but to my engineering brain it doesn't evoke the cascading consequences of the model for the rest of the system. It's a rare product manager who treats the domain model as a consequential design product and a potential site of innovation.