O que significa STX, SOH e GS na saída do Notepad ++?

Question

Ao rever a fonte MIME de um email (presumivelmente contendo caracteres internacionais), vejo coisas como esta no Notepad ++

Entendo que CRLF é o feed da linha de retorno de carro, mas e os outros? O que SOH , GS e STX significa?

    

Answer 1

O Notepad ++ usa esses símbolos para representar caracteres de controle.

Caractere de controle - Wikipedia

A control character or non-printing character is a code point (a number) in a character set, that does not represent a written symbol.

Códigos de controle C0 e C1 - Wikipedia

STX - Start of Text - First character of message text, and may be used to terminate the message heading.

SOH - Start of Header - First character of a message header.

GS - Group Separator - Can be used as delimiters to mark fields of data structures. If used for hierarchical levels, US is the lowest level (dividing plain-text data items), while RS, GS, and FS are of increasing level to divide groups made up of items of the level beneath it.

    

Answer 2

SOH é Start Of Header

STX é Start of teXt

GS é Group Seperator