Example:Empirical Study on Variable Naming What are the style,abbreviation,..of variable names? Are they correlated to bugs/code quality/...? You can study this by treating code as a tokenized text stream 1"(a+b)*2”=> 2【(SYM,('),(ID,'a'),(BIN0P,'+),(ID,'b'),(SYM,)'),(BIN0P,*'),(INT,'2)J We are interested in the IDsExample: Empirical Study on Variable Naming Are they correlated to bugs/code quality/…? You can study this by treating code as a tokenized text stream We are interested in the IDs What are the style, abbreviation, … of variable names? 1 "(a + b) * 2" => 2 [ (SYM, '('), (ID, 'a'), (BIN_OP, '+'), (ID, 'b'), (SYM, ')'), (BIN_OP, '*'), (INT, '2') ]