A Systematic Literature Review on Using Machine Learning Algorithms for Software Requirements Identification on Stack Overflow

Table 12

NLP techniques used for text processing.

NLP process	Paper ID	Support level
Stop words removal	S02, S04, S06, S07, S08, S09, and S11	7
Case unification	S02, S04, S06, S08, S09, and S11	6
Tokenization	S02, S04, S06, S08, and S09	5
Stemming	S07, S09, and S11	3
Punctuations removal	S09 and S11	2
Filtration	S10	1