(U+6268): Add `<-denotational@usage' for BUCS+6268.

(U+6268): Add `<-denotational@usage' for BUCS+6268.
(U-00022AB8): Apply new conventions for glyph granularity.
(U-00022AEA): Use `->denotational' and `->subsumptive'.
(A-U+22AEA-itaiji-001): New abstract node.
(U+22AEA-itaiji-001): New character; use `<-denotational' for
A-U+22AEA-itaiji-001.
(U+6365): Apply new conventions for glyph granularity; use
`<-denotational@usage' for A2-DJT-03833.
(U-00022B97): Use `->denotational' and `->subsumptive'.
(U-00022BF2): Apply new conventions for glyph granularity.
(DJT-03928): New character; use `<-denotational@usage' for BUCS+64E7.
(U+64E7): Use `<-denotational@usage' for BUCS+64E7.
(U-00022E15): New character.
(U-00022EB4): Use `->denotational' and `->subsumptive'.
(BUCS+6268): New abstract node.
(A2-DJT-03833): New abstract node.
(BUCS+64E7): New abstract node; unify A2-DJT-09632.