From: Mark Davis, Markus Scherer
Re: Clarification of implicit weights for ideographs in UCA
UCA has the following description of how to generate implicit weights:
The value for BASE depends on the type of character:
This is unfortunately not crystal-clear. It will also need to be updated when we add additional CJK Ideographic blocks.
The goal was to include all the Unified Ideographs. The issue is what counts as "CJK Ideograph", and what counts as "CJK Ideograph Extension A/B". Our presumption is that: