The following terms have particular definitions as it relates to their usage within the Amazon Ion Specification documents.
A symbol token is a piece of text mapped to a integer symbol ID by a symbol table. In the binary format a symbol token is always encoded using the integer, not the text.
Such tokens occur in three distinct contexts within the data model: symbol values, annotations, and field names.
A symbol value is a scalar value (like an integer or string) that is encoded as a symbol token.
A (potentially unbounded) sequence of Ion values in either text or binary.