SNOMED CT Expression Constraints can be automatically validated to ensure that they
conform to a variety of rules, including:
- Expression constraints must conform to one of the syntaxes defined in
Chapter 5. Syntactic validation can be performed using an expression parser, as described in
- Expression constraints must conform to the concept model. This validation can be performed
by comparing the parsed expression constraint against the rules defined in the SNOMED
CT concept model;
- All concept references included in the expression constraint must be valid. In most
cases this means that the concept references must refer to active concepts in the
given version and edition of SNOMED CT;
All concept references used to refer to attribute names must be a descendant of
All concept references to which a memberOf function is applied must be a descendant
900000000000455006 |Reference set|;
- All concept references to which a memberOf function is applied must contain only referencedComponentIds
that refer to concepts.
Please note that some of these rules may not apply in all environments.