Provide a Measurement/Quantity List structure

[keilw]

While it probably won't be more than an optional type in a module like "util" (similar to others like Range) how do you consider a "List Pattern" similar to Unicode CLDR:
http://cldr.unicode.org/index/downloads/cldr-24#TOC-Enhanced-units-structure

A new element specifies patterns for time durations involving combinations of hours, minutes, and seconds, such as "Video >length: 93:45".
or
These are intended to be used for constructing formats such as "2 hours, 5 minutes", "2 hrs, 5 mins", or "2h 5m"
Essentially it is similar to TemporalAmount: http://docs.oracle.com/javase/8/docs/api/java/time/temporal/TemporalAmount.html
in JSR 310, but unlike 310 there is no structural "array" of units in ICU4J.
Instead, e.g. MeasureFormat: http://icu-project.org/apiref/icu4j/com/ibm/icu/text/MeasureFormat.html allows formatting more than one measurement:
MeasureFormat fmtEn = MeasureFormat.getInstance(ULocale.ENGLISH, FormatWidth.WIDE);
// Output: 1 inch, 2 feet
fmtEn.formatMeasures(
new Measure(1, MeasureUnit.INCH),
new Measure(2, MeasureUnit.FOOT));
So it could be handled by Formatting/Parsing similar to ICU4J, where at most an array or collection of individual measurements is used, or via a structural type similar to JSR 310. I don't think we should overcomplicate the Measurement/Quantity type similar to TemporalAmount, but as with Range it could be provided in an optional module (or even just on RI level) if there's value to it.