(U-00020730): Use `->denotational' and `->subsumptive'.

(U-00020730): Use `->denotational' and `->subsumptive'.
(U-00020727): New character; use `<-denotational' for U-00020730.
(M-02023): Unify IU+20727; use `<-denotational' for U-00020727 instead
of `=>ucs' for U-00020730.
(U+5250): Apply new conventions for glyph granularity; use
`<-denotational@usage' instead of `<-denotational' for BUCS+526E.
(U-0002073B): Add `ideographic-structure'.
(U-00020741): Add `ideographic-structure'; add `sound@ja/on'.
(U+34F0): New character.
(U-00020748): New character.
(U+526E): Use `<-denotational@usage' instead of `<-denotational' for
BUCS+526E.
(A-IWDSU+20766): New abstract node.
(U-00020766): Use `->denotational' and `->subsumptive'; add
`<-denotational' for A-IWDSU+20766.
(U-00020749): Likewise.
(U-000207B7): Apply new conventions for glyph granularity.
(U+5283): Likewise; use `<-denotational@usage' instead of
`<-denotational' for BUCS+5283.
(U-000207F1): Use `->denotational' and `->subsumptive'.
(U-000207F7): Add `<-ancient' for U+756B.
(U+5290): Add `sound@ja/on/{kan|go}'.
(CU+5290): Add some relations for other characters.