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document classification
文書分類
Categorization
classification (disambiguation)
compound-term processing
Concept-based image indexing
Content-based image retrieval
Document
Supervised learning, unsupervised learning
Document retrieval
Document clustering
Information retrieval
knowledge organization
Knowledge Organization System
library classification
machine learning
Native Language Identification
String metrics
Subject (documents)
subject indexing
Text mining, web mining, concept mining

googledocument classification
image document classification
define document classification
wikipedia document classification
weblio document classification
kotobank document classification
jisho document classification