[Q] Documentation for upgrade path from jscience

[rvaidya]

Hi there, I've tried a few times now to convert from jscience for unit parsing, but I haven't been able to find the correct way forward to create a generalized unit parser that can handle non-SI units, as well as having formatted strings for those non-SI units.

Is the correct way to do this using the SimpleUnitFormat and registering aliases for everything the default implementation doesn't handle? Units like Fahrenheit and mmHg are definitely not within the UCUM space (and the UCUM format doesn't handle unicode), the systems-unicode package doesn't seem to provide the parsing capabilities, and I'm not entirely sure what the EBNF format is but unit text coming in from various external sources definitely isn't going to be following a regular grammar.

Also, the different unit system packages do overlap for units, how do I figure out which unit system package is best for which unit? Can I use any of them?

Thank you.