This code system http://hl7.org/fhir/codesystem-hierarchy-meaning defines the following codes:
|
Code
|
Display
|
Definition
|
| grouped-by
|
Grouped By |
No particular relationship between the concepts can be assumed, except what can be determined by inspection of the definitions of the elements (possible reasons to use this: importing from a source where this is not defined, or where various parts of the hierarchy have different meanings) |
| is-a
|
Is-A |
A hierarchy where the child concepts have an IS-A relationship with the parents - that is, all the properties of the parent are also true for its child concepts |
| part-of
|
Part Of |
Child elements list the individual parts of a composite whole (e.g. body site) |
| classified-with
|
Classified With |
Child concepts in the hierarchy may have only one parent, and there is a presumption that the code system is a "closed world" meaning all things must be in the hierarchy. This results in concepts such as "not otherwise classified." |