Precoordinated expressions consist of a single
identifier, followed optionally by any term that is associated with that
. While the use of a term is not mandated, it is often preferable to include
s from an appropriate dialect within the expressions to improve the human-readability
of the expression. For example:
73211009|diabetes mellitus|
As mentioned, the syntax does not require a term to be used with each concept identifier,
so the following is also a valid
:
73211009
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