Rasa NER

 

Component	Requires	Model	notes
ner_crf	sklearn-crfsuite	conditional random field	good for training custom entities
ner_spacy	spaCy	averaged perceptron	provides pre-trained entities
ner_duckling_http	running duckling	context-free grammar	provides pre-trained entities
ner_mitie	MITIE	structured SVM	good for training custom entities

NER中可以用正则表达式帮助CRF进行实体识别，在Training Data Format（https://rasa.com/docs/nlu/dataformat/）中，可以给出一个正则表达式列表，为ner_crf增加一个额外的特征项（1 or 0），表示是否检测到正则表达式。