QUOTEDIDENTIFIER
A double-quote-delimited identifier. Allows any character sequence, including spaces and reserved words, to serve as an identifier. Supports the same escape sequences as string literals.
Examples
Quoted identifier for a named expression
"Measurement Period"
Quoted identifier for a value set
"Diabetes Mellitus Conditions"
Quoted identifier in a retrieve
[Condition: "Hypertension Value Set"]
EBNF
QUOTEDIDENTIFIER : '"' (ESC | .)*? '"' ;