Delimitador-Separado que também pode usar o sublinhado (Delimiter_Separated).
...A common recommendation is "Use meaningful identifiers." A single word may not be as meaningful, or specific, as multiple words. Consequently, some naming conventions specify rules for the treatment of "compound" identifiers containing more than one word.
As most programming languages do not allow whitespace in identifiers, a method of delimiting each word is needed (to make it easier for subsequent readers to interpret which characters belong to which word).
One approach is to delimit separate words with a nonalphanumeric character. The two characters commonly used for this purpose are the hyphen ("-") and the underscore ("_"); e.g., the two-word name
"two words"would be represented as
"two_words". The hyphen is used by nearly all programmers writing COBOL, Forth, and Lisp; it is also common for selector names in Cascading Style Sheets. Most other languages (e.g., languages in the C and Pascal families) reserve the hyphen for use as the subtraction infix operator, so it is not available for use in identifiers and underscores are therefore used instead...