SNOMED CT Diagramming notes As shown diagrams must show descriptions and can optionally show identifiers. Descriptions may be "Fully Specified Names" or "Preferred Terms" for diagram elements, but not a mixture of both on one diagram. Shading maybe used with the colours shown in this template for each element type, or shading may be removed entirely for black and white diagrams. Layout is generally left-to-right and top-to-bottom. Relationships are ordered down the diagram as follows: Is-a, then ungrouped relationships, followed by grouped relationships. For finer grained ordering of relationships, the sort order defined in the Technical Implementation Guide should be used. Elements and font size may be adjusted to suit needs, however where possible elements should remain rectangular, wider than they are tall.

SNOMED CT Diagramming without identifiers Defined concept ≡ Defined concept Attribute Defined concept Attribute Defined concept Attribute Defined concept Attribute Concept

SNOMED CT Diagramming with identifiers 11111111 Defined concept ≡ 11111111 Defined concept 22222222 Attribute 11111111 Defined concept 22222222 Attribute 11111111 Defined concept 22222222 Attribute 11111111 Defined concept 22222222 Attribute 44444444 Concept

SNOMED CT Expression subsumed by 11111111 Defined concept 22222222 Attribute 11111111 Defined concept ⊑ 44444444 Concept 22222222 Attribute 333333333 Defined concept

SNOMED CT Expression subsumes 11111111 Defined concept 22222222 Attribute 11111111 Defined concept ⊒ 44444444 Concept 22222222 Attribute 333333333 Defined concept

SNOMED CT Expression equivalent 11111111 Defined concept 22222222 Attribute 11111111 Defined concept ≡ 44444444 Concept 22222222 Attribute 333333333 Defined concept