this comes from "NoSQL ＆ SQL Data Modeling" by Ted Hills.
The rectangle represents a logical record type. This is not a type in the sense of a generalization/specialization hierarchy. It is a type in the sense that it designates a set. A logical record type is a list of data attributes aggregated together, and it implicitly designates the set of all possible values of those data attributes taken together—the Cartesian product of the data attributes’ types. Sometimes the display of these data attributes is suppressed, and only the name of the entity is visible, but the rectangle represents the data attributes nonetheless
is it idiomatic to put "nonetheless" at the end of a sentence?