Support for compound #4
Description
The type is string but the value is actually a compound of two or more fields.
For example measurement is a compound of the value and the unit. The output will be something like 25 m.
Every subfield could be defined independently. For example, the value is limited to 0 to 999 and the unit could be meter, feet, parsec. The delimiter is configurable too.
Another example is URL. It's constructed from elements: scheme, host, path, query, fragment.
Date-time is another obvious example.
See date-time editor on OS X for the reference.