Note: This is more complicated than it should be: we need to simplify the process. We just haven't gotten there yet with everything else going on!
First read Running Tools
Update Script Metadata
Reformat plurals/ordinals.xml with GeneratedPluralRules.java. Review carefully before checking in.
Regenerate Supplemental Charts: Generating Charts
The following tells how to get the version info for imported data used in a CLDR release.