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Stanford Parser

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Stanford Parser

https://nlp.stanford.edu/software/lex-parser.shtml

  • Probabilistic Natural Language Parser
    • PCFG (Probabilistic Context Free Grammar) 確率的文脈自由文法

  • オンライン・デモ

http://nlp.stanford.edu:8080/parser/


  • 参考文献

https://nlp.stanford.edu/software/lex-parser.shtml#Citing


 Stanford Dependencies

https://nlp.stanford.edu/software/stanford-dependencies.html

  • Universal Dependencies v1

http://universaldependencies.org/docsv1/

  • Universal Dependencies v2

https://universaldependencies.org/

  • Neural-network dependency parser

https://nlp.stanford.edu/software/nndep.html

SD for English

https://nlp.stanford.edu/software/stanford-dependencies.html#English

  • マニュアル

https://nlp.stanford.edu/software/dependencies_manual.pdf

Typed Dependencies

  • 約50の文法関係
    • governor (head) と dependent の二項関係
  • 品詞はPenn Treebank
acomp: adjectival complement
advcl: adverbial clause modifier
advmod: adverb modifier
agent: agent
amod: adjectival modifier
appos: appositional modifier
aux: auxiliary
auxpass: passive auxiliary
cc: coordination
ccomp: clausal complement
conj: conjunct
cop: copula
csubj: clausal subject
csubjpass: clausal passive subject
dep: dependent
det: determiner
discourse: discourse element
dobj: direct object
expl: expletive
goeswith: goes with(本来はつなげるところ間違って2語にしたもの with out)
iobj: indirect object
mark: marker
mwe: multi-word expression(一語扱いがふさわしい連語 as well as)
neg: negation modifier
nn: noun compound modifier
npadvmod: noun phrase as adverbial modifier
nsubj: nominal subject
nsubjpass: passive nominal subject
num: numeric modifier
number: element of compound number
parataxis: parataxis
pcomp: prepositional complement
pobj: object of a preposition
poss: possession modifier
possessive: possessive modifier
preconj: preconjunct
predet: predeterminer
prep: prepositional modifier
prepc: prepositional clausal modifier
prt: phrasal verb particle
punct: punctuation
quantmod: quantifier phrase modifier
rcmod: relative clause modifier
ref : referent
root: root
tmod: temporal modifier
vmod: reduced non-finite verbal modifier
xcomp: open clausal complement
xsubj: controlling subject

Dependency Representation

  • 依存関係出力の際の表示形式のいろいろ

  1. Basic
  2. Collapsed
  3. Propagation
  4. Collapsed Tree

  • List of two-word prepositions that the system can collapse
according to as per compared to instead of preparatory to
across from as to compared with irrespective of previous to
ahead of aside from due to next to prior to
along with away from depending on near to pursuant to
alongside of based on except for off of regardless of
apart from because of exclusive of out of subsequent to
as for close by contrary to outside of such as
as from close to followed by owing to thanks to
as of contrary to inside of preliminary to together with

  • List of three-word prepositions that the system can collapse
by means of in case of in place of on behalf of with respect to
in accordance with in front of in spite of on top of
in addition to in lieu of on account of with regard to

 使い方

  • プログラム言語はJAVA
  • 文法データファイル含めて300MB弱