Ion is a data serialization language developed by Amazon.
The text form is a superset of JSON; thus, any valid JSON document is also a valid Ion document.
As a superset of JSON, Ion includes the following data types The nebulous JSON 'number' type is strictly defined in Ion to be one of Ion adds these types: Each Ion type supports a null variant, indicating a lack of value while maintaining a strict type (e.g., null.int, null.struct).
The Ion format permits annotations to any value in the form of symbols.
Such annotations may be used as metadata for otherwise opaque data (such as a blob).