Current Version - Under Revision
- precoordinated expression: An expression containing a single concept identifier is precoordinated. The clinical idea it expresses is represented by the identified concept. The defining relationships of that concept precoordinate its meaning.
- postcoordinated expression: expression that contains two or more concept identifiers is postcoordinated. The concept identifiers in a postcoordinated expression are related to one another in ways that build a more specific clinical idea. The required meaning is expressed by postcoordinating several clinical ideas each of which is represented by an identified concept.