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Life Science Database Archive
MeCab user dictionary for science technology term

MeCab user dictionary: Nikkaji (Japan Chemical Substance Dictionary)

Data detail

info Data name MeCab user dictionary: Nikkaji (Japan Chemical Substance Dictionary)
info DOI 
info Version 
V2No Update
V1-
info Description of data contents 

A user dictionary for morphological analysis engine MeCab(http://taku910.github.io/mecab/) from J-GLOBAL science and technology terms that have linked to Japan Chemical Substance Dictionary (Nikkaji), an organic compound dictionary database prepared by the Japan Science and Technology Agency. The dictionary items are based on IPA dictionary. Csv file is encoded in Shift-JIS and dic file is encoded in UTF-8.

info Data file 
File name:
Nikkaji.dic.zip (MeCab dic format)
File URL:
https://dbarchive.biosciencedbc.jp/data/mecab/LATEST/Nikkaji.dic.zip
File size:
6.6 MB
File name:
mecab_nikkaji.zip (csv format)
File URL:
https://dbarchive.biosciencedbc.jp/data/mecab/LATEST/mecab_nikkaji.zip
File size:
2.4 MB
info Simple search URL 
info Data acquisition method 

IPA dictionary (mecab-ipadic-2.7.0-20070801 downloaded from MeCab's site [see above])、J-GLOBAL Knowledge

info Data analysis method -
info Number of data entries 

82,922 entries

Data itemDescription
Surface form The word itself
Left-context ID MeCab internal ID for left context (see http://taku910.github.io/mecab/dic.html)
Right-context ID MeCab internal ID for right context (see http://taku910.github.io/mecab/dic.html)
Cost The cost for the likelihood of the word to appear in a sentence (smaller, more likely)
POS Part of speech
POS subcategory 1 POS subcategory 1
POS subcategory 2 POS subcategory 2
POS subcategory 3 POS subcategory 3
Conjugation type Conjugation type
Conjugation form Conjugation form
Base form Same as the surface form
Reading('Furigana') (empty)
Pronunciation (empty)
Source dictionary It is fixed as 'Nikkaji'.
ID in Source dictionary MeSH UID
J-GLOBAL ID ID in J-GLOBAL
Headword Flag It is fixed as 'C'.
Category code Category code of science fields in JST Thesaurus
Common word flag 1 ・1: There is an entry (or entries) for the surface form in IPA dictionary
・0: There are no entries for the surface in IPA dictionary
Common word flag 2 Based on "IPA dictionary analysis results":
・When the value of Common word flag １ is 1, the value of this flag is the part of speech for the IPA dictionary analysis result.
・When the value of Common word flag １ is 0:
- UNKNOWN_1: if the result is one unknown word
- UNKNOWN_2: if the result is multiple tokens including unknown word
- MULTI_WORD: if the result is multiple tokens in IPA dictionary
IPA dictionary analysis results Results of the morphological analysis with the original IPA dictionary (and the dictionary with IPA dictionary entries where zenkaku alphanumeric characters and symbols are converted into corresponding hankaku characters). If the result is devided into multiple tokens, it is whitespace-separated. It is not manually corrected.