SNOMED Documentation Search
Relationships, or attributes, are represented using a rectangle with rounded ends and a double line boarderborder, as shown below:
Anchor
...
"Is a" (subtype) relationships are highlighted by using an open-headed arrow as shown below:
_Ref206157629 Anchor
Figure 16 "Is a" element
The rounded rectangle specified in section 4.2 is omitted when representing "Is a" relationships, and the arrow head always points to the parent (super-type) concept.
...