Introduction

The NHS data standards logical data model includes all the classes, attributes and relationships necessary to support the information required for Central Returns to ensure that returned information is consistent. A Central Return is represented by a diagram which contains the classes and their relationships which are required to support it. Not all items of information required by Central Returns are defined classes or attributes but instead are derived by manipulation or aggregation of attributes within the classes shown on the diagrams.

The Central Return Diagrams are grouped by functional area heading.