Parsing of 1/mile is not possible

[acimail01]

SimpleUnitFormat.getInstance().alias(USCustomary.MILE, "mile");
Quantity<?> q1 = ServiceProvider.current().getFormatService().getQuantityFormat().parse("3 km");
Quantity<?> q2 = ServiceProvider.current().getFormatService().getQuantityFormat().parse("3 mi");
Quantity<?> q3 = ServiceProvider.current().getFormatService().getQuantityFormat().parse("3 mile");
// Quantity<?> q4 = ServiceProvider.current().getFormatService().getQuantityFormat().parse("3 1/km"); // Exception
Quantity<?> q5 = ServiceProvider.current().getFormatService().getQuantityFormat("EBNF").parse("3 1/km");
// Quantity<?> q6 = ServiceProvider.current().getFormatService().getQuantityFormat("EBNF").parse("3 1/mi"); // Exception
// Quantity<?> q7 = ServiceProvider.current().getFormatService().getQuantityFormat("EBNF").parse("3 1/mile"); // Exception

Parsing of 1/km with Simple-Parser is not possible
Parsing of 1/mile wirh EBNF-Parser is not possible

[keilw]

Could you please elaborate the use case for this?

Even in the UCUM Specification which is by far the most extensive catalog of units there is no definition of "1/km", "1/kg" or similar, meaning it would likely fail against UCUMFormat or UCUM's own test suites as well.