The FSH grammar already allows the display to be set by specifying a quoted string after the reference (e.g., `Reference(Amy) "Amy P"`). This is consistent with the syntax for setting display on a code. We will document this in the specification. The type and identifier can be set via normal rules. E.g.: ``` subject = Reference(Amy) "Amy P" subject.type = "Patient" subject.identifier.system = "http://mysystem.org" subject.identifier.value = "abc123" ``` Note that rules for type and identifier can go before or after the reference assignment. Assigning the reference via Reference keyword does not overwrite type or identifier. We considered adding special syntax for setting type or identifier alongside the `Reference()` keyword, but felt that the frequency of setting these did not justify the additional complexity. Once a single syntactical statement contains more than 2 or 3 parts, it becomes difficult for users to remember the correct order of the parts.