# description
The type of operator to use for assertion.

# concept[].definition
Compare value within a known set of values.

# concept[].definition
Compare value not within a known set of values.

# concept[].definition
Compare value to be greater than a known value.

# concept[].definition
Compare value to be less than a known value.

# concept[].definition
Compare value string contains a known value.

# concept[].definition
Compare value string does not contain a known value.

# concept[].definition
Evaluate the FHIRPath expression as a boolean condition.