Editing Control character (section)

===Data structuring===
The separators (File, Group, Record, and Unit: FS, GS, RS and US) were made to structure data, usually on a tape, in order to simulate [[punched card]]s.
End of medium (EM) warns that the tape (or other recording medium) is ending.
While many systems use CR/LF and TAB for structuring data, it is possible to encounter the separator control characters in data that needs to be structured.  The separator control characters are not overloaded; there is no general use of them except to separate data into structured groupings.  Their numeric values are contiguous with the space character, which can be considered a member of the group, as a word separator.

For example, the RS separator is used by {{IETF RFC|7464}} (JSON Text Sequences) to encode a sequence of JSON elements. Each sequence item starts with a RS character and ends with a line feed. This allows to serialize open-ended JSON sequences. It is one of the [[JSON streaming]] protocols.