The Data Structure provides the final
rounding picture to a model whose description began with the Entity
Relationship Diagram and the Data Element Dictionary.
This document is the ERMI-recommended
approach to turning the conceptualization of the ERD and the DED into
something approaching a relational database design.
Each of the elements
in the Dictionary have been mapped into entities described in the ERD.
Some new “elements” have been inserted to
represent the needed relationships between entities that were described in the
ERD as well.
Finally, each element has been annotated with information about
data type (numeric, text, logical, date, etc.)
functionality (outline labels from the Functional Requirements document are included)
optionality
cardinality
and other needed notes or examples