Figure 3.1-1: Simple expression diagram
Expression diagrams are the most general form of diagram, which represent a SNOMED CT expression as defined in the SNOMED CT Compositional Grammar. Diagrams representing expressions may exist on their own, or be part of a larger diagram representing a concept definition or relation between two expressions.
In its simplest form this may simply be a single concept
Figure 3.1-2: Diagram of the single concept INLINE95617006 | Neonatal cyanosis |
In more complex scenarios diagrams may represent coordination of attribute types and concepts.
Figure 3.1-3: _Ref347406127Figure 4 Expression equivalentINLINEEquivalent as at the January 2012 SNOMED CT International release.*toINLINE95617006 | Neonatal cyanosis |
In all expressions other than a single concept value
1 it is necessary to start the diagram with a conjunction dot.
An example of an expression is shown in Figure 4, whereas a single concept value is shown in Figure 3