The terms "go to the very root of a contract" and "go to the root of a contract" are used here without any explanation of what going to the root means. Unless this is clarified in related text when the value set is viewed as part of the complete FHIR document the term should be explained or replaced with a self-explanatory term.

For example, does going to the root mean something that, if it is not true, voids the contact? What is the difference between going to the root and going to the very root?