The child code is a more narrow version of concept represented by the parent code. I.e. Every child concept is also a valid parent concept. Used to allow determination of subsumption. Must be transitive, irreflexive, antisymetric.

The child code is a part of the concept represented by the parent code. Used to determine allowed nesting, for example of address components. Must be transitive, irreflexive, antisymetric.

The child code is a part of a grouping represented by the parent code. Used to determine navigational hierarchy not based on a specializes or component relationship. E.g. ICD9 hierarchy. Is transitive, irreflexive and antisymetric

For coded ordeinal code systems, indicates that the specified code is considered less than the related code. Used to determine relationships for coded ordinals. Must be transitive, irreflexive, antisymetric.

Identifies a code that can act as a qualifier for the referenced code, both as part of concept definition within the code system and as part of run-time concept definition to determine concepts allowed for use as qualifiers for a concept within a CD datatype. Must be non-transitive, irreflexive.

Same as definitionally qualifies, but restricted to only being used at run-time. Must be non-transitive, irreflexive.

Inverse of Specializes. Only included as a derived relationship

Inverse of ComponentOf. Only included as a derived relationship

Inverse of GroupedBy. Only included as a derived relationship

Inverse of LessThan. Only included as a derived relationship

Inverse of DefinitionallyQualifies. Only included as a derived relationship

Inverse of NonDefinitionallyQualifies. Only included as a derived relationship

The child code has a relationship with the parent that does not follow one of the pre-defined stereotypical patterns. Any application behavior based on the relationship must be custom-coded. Transitivity, Reflexivity and Symmetry must be asserted