Radicals ( Radical26) two strokes in Kanji;
dimensional, e.g.
Chinese Romanization ( cr) 's one of the characters:
www.jisho.org radical number 22 ... ;
directional, e.g.
;
logical, e.g.
in Kanji: box-on-side;
numerological, e.g.
2;
structural, e.g.