From catalog/rfc9110-http.abnf rule: RWS

Definition

RWS = 1*( SP / HTAB )

    

Info

Rulename
RWS
Dependencies
HTAB, SP, RWS
Used Builtins
HTAB, SP

Alphabet

Translations

Railroad Diagram

RWS SP HTAB

ECMAScript/JavaScript Regular Expression Literal

/^[\x09 ]+$/

Swift Regular Expression

[\u{9} ]+

POSIX Extended Regular Expression

[\x09 ][\x09 ]*