This tab shows a standardized representation of concept definitions in accordance with SNOMED CT Diagramming Standard. This consists of:

Diagram elements

Concepts: Concepts are represented by a box containing the concept name.

The light blue box represents primitive concepts

The light purple box with a double-line represents suficiently defined concepts
Relationships or attributes are represented using a rectangle with rounded ends and a double-line border:
IS-A (subtype) relationships are represented with an open-headed arrow:
Equivalent to:
Attribute groups are represented with a circle:
A conjunction is represented with a black “dot” (black filled small circle). It is only
necessary when two or more attributes are being joined in a diagram. It is optional when
attaching a single attribute:
An arrow is used to connect related elements where the connection is unidirectional. Connecting arrows always have an arrow head at one end, and therefore have an explicit direction from one element to another:
A line is used to connect elements in the diagram where the connection is bidirectional:

According to this diagramming standard, a complete concept definition is represented as:

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