OptionalcdsIf the reference is only effective, if, for example, an if-then-else condition is true, this references the root of the if.
Optional ReadonlyglobalWhether the read is evaluated in the global environment (source() within a function), so no frame below it can bind it
ReadonlynameName the reference is identified by (e.g., the name of the variable), undefined if the reference is "artificial" (e.g., anonymous)
ReadonlynodeThe id of the node which represents the reference in the NormalizedAst|normalized AST and the DataflowGraph|dataflow graph.
ReadonlytypeType of the reference to be resolved
An identifier reference points to a variable like
ainb <- a.