The KanjiXML file contains the 6,355 kanji in the JIS X 0208-1990 standard.
With their mappings to 

(from the kanjidic file)
-- the radical (Bushu) number.
-- the historical or classical radical number
-- the frequency-of-use ranking.
-- the Jouyou grade level.
-- general-use characters.
-- Jinmeiyou ("for use in names") characters.
-- the index number in the New Japanese-English Character Dictionary, edited by Jack Halpern.
-- the index number in the Modern Reader's Japanese-English Character Dictionary, edited by Andrew Nelson.
-- the index number in The New Nelson Japanese-English Character Dictionary, edited by John Haig. 
-- these are the codes developed by Father Joseph De Roo, and published in his book "2001 Kanji" (Bojinsha). 
-- the index numbers used by Jack Halpern in his Kanji Learners Dictionary.
-- the index numbers used in P.G. O'Neill's Essential Kanji.
-- the SKIP pattern code. Developed by Jack Halpern.
-- the stroke count.
-- the Unicode encoding of the kanji.
-- the index codes in the reference books by Spahn & Hadamitzky, The Kanji Dictionary
-- the index codes in the reference books by Spahn & Hadamitzky, Kanji & Kana book.
-- the "Four Corner" code for that kanji.
-- the index number and volume.page respectively of the kanji in the 13-volume Morohashi "Daikanwajiten.
-- the index number used in "A Guide To Remembering Japanese Characters" by Kenneth G. Henshall.
-- the index number in the Gakken Kanji Dictionary ("A New Dictionary of Kanji Usage").
-- the index number used in "Remembering The Kanji" by James Heisig. 
-- the index number in "Japanese Names", by P.G. O'Neill. 
-- the romanized form of the Korean reading(s) of the kanji.
-- the "Pinyin" of each kanji, i.e. the (Mandarin or Beijing) Chinese romanization.
-- japanese readings in katakana, hiragana, and romaji.
-- prefixes, suffixes denoted
-- okurigana
-- nanori

New material:
-- Alexander Kask index on his Kanji Cards by Tuttle.
-- Shift JIS codes
-- Index from Tohsaku's books the Yookoso Series. Book num, chapter, index


(Not yet included from the kanjidic file)
-- a cross-reference code. 
-- a mis-classification code.