Provides access to metadata extracted from the IFD part of a JPEG XR file.
Adds simple logic to translate the raw byte data into primitive data types.
The getters don't return primitive language types, so as to allow returning
null. That value indicates a missing metadata element and cannot
be confused with a numerical value (e.g. 0). This class also verifies value
validity on a very basic level (no inferring of metadata value combination
meanings), and where needed - returns a default as dictated by the ITU-T