(U+5C88): Add `<-denotational@usage' for BUCS+5C88 and A2-DJT-11238;

(U+5C88): Add `<-denotational@usage' for BUCS+5C88 and A2-DJT-11238;
add `ideographic-structure'; unify DJT-02535.
(U+5CF6): Add `<-denotational@usage' for BUCS+5CF6; apply new
conventions for glyph granularity.
(U-00021DF0): New character.
(U-00021E7B): Apply new conventions for glyph granularity.
(U-00021E56): New character.
(U+5D4D): Apply new conventions for glyph granularity.
(U-00021E78): Apply new conventions for glyph granularity.
(U-00021EA5): Likewise.
(U-0002AA43): New character.
(U-00021ECC): New character.
(U-00021ECE): New character.
(U-00021ECF): New character.
(U+5D80): Apply new conventions for glyph granularity.
(U+3800): Add `<-denotational@usage' for BUCS+5CF6; apply new
conventions for glyph granularity.
(U+5D8B): Add `<-denotational@usage' for BUCS+5CF6 and BUCS+5CF6;
apply new conventions for glyph granularity.
(U+5D8C): Add `<-denotational@usage' for BUCS+5D8C and BUCS+5CF6;
apply new conventions for glyph granularity.
(BUCS+5C88): New abstract node.
(BUCS+5CF6): New abstract node; unify A2-DJT-02594.
(BUCS+5D8C): New abstract node.