input: line*. -line: name, s, amount, newline. name: word++([Zs]+). -word:[L]+. amount: currency, number. @currency: [Sc]. -number: [Nd]+. -newline: s?, (-#a; -#d)+. -s: -[Zs]+.

data: value++-",", @source. source: +"ixml". value: pos; neg. -pos: +"+", digit+. -neg: +"-", -"(", digit+, -")". -digit: ["0"-"9"].

date: day, -" ", month, -" ", year. @day: digit, digit?. -digit: "0"; "1"; "2"; "3"; "4"; "5"; "6"; "7"; "8"; "9". @month: "January"; "February"; "March"; "April"; "May"; "June"; "July"; "August"; "September"; "October"; "November"; "December". @year: digit, digit, digit, digit.

dates: s?, date+. date: day, s, month, s, year, s?. day: digit, digit?. -digit: "0"; "1"; "2"; "3"; "4"; "5"; "6"; "7"; "8"; "9". month: "January"; "February"; "March"; "April"; "May"; "June"; "July"; "August"; "September"; "October"; "November"; "December". year: digit, digit, digit, digit. -s: (-" "; -#d; -#9; -#a)+.

strings: s?, string**(-",", s). string: -'"', ~['"']*, -'"'. -s: -" "*.

url: scheme, ":", authority, path. scheme: letter+. authority: "//", host. host: sub++".". sub: letter+. path: ("/", seg)+. seg: fletter*. -letter: ["a"-"z"]; ["A"-"Z"]; ["0"-"9"]. -fletter: letter; ".".

expr: open, -arith, @close, -";". @open: "(". close: ")". arith: left, op, ^right>second. left>first: operand. -right: operand. -operand: name; -number. @name: ["a"-"z"]. @number: ["0"-"9"]. -op: sign. @sign>operator: "+"; "-".

ixml: s, (prolog, RS)?, rule++RS, s. -s: (whitespace; comment)*. {Optional spacing} -RS: (whitespace; comment)+. {Required spacing} -whitespace: -[Zs]; tab; lf; cr. -tab: -#9. -lf: -#a. -cr: -#d. comment: -"{", (cchar; comment)*, -"}". -cchar: ~["{}"]. prolog: version. version: -"ixml", RS, -"version", RS, string, s, -'.' . rule: naming, -["=:"], s, -alts, -".". -naming: (mark, s)?, name, s, (-">", s, alias, s)?. @name: namestart, namefollower*. -namestart: ["_"; L]. -namefollower: namestart; ["-.·‿⁀"; Nd; Mn]. @alias: name. alts: alt++(-[";|"], s). alt: term**(-",", s). -term: factor; option; repeat0; repeat1. -factor: terminal; nonterminal; insertion; -"(", s, alts, -")", s. repeat0: factor, (-"*", s; -"**", s, sep). repeat1: factor, (-"+", s; -"++", s, sep). option: factor, -"?", s. @mark: ["@^-"]. sep: factor. nonterminal: naming. -terminal: literal; charset. literal: quoted; encoded. -quoted: (tmark, s)?, string, s. @tmark: ["^-"]. @string: -'"', dchar+, -'"'; -"'", schar+, -"'". dchar: ~['"'; Cc]; '"', -'"'. {all characters except controls; quotes must be doubled} schar: ~["'"; Cc]; "'", -"'". {all characters except controls; quotes must be doubled} -encoded: (tmark, s)?, -"#", hex, s. @hex: ["0"-"9"; "a"-"f"; "A"-"F"]+. -charset: inclusion; exclusion. inclusion: (tmark, s)?, set. exclusion: (tmark, s)?, -"~", s, set. -set: -"[", s, (member, s)**(-[";|"], s), -"]", s. member: string; -"#", hex; range; class. -range: from, s, -"-", s, to. @from: character. @to: character. -character: -'"', dchar, -'"'; -"'", schar, -"'"; "#", hex. -class: code. @code: capital, letter?. -capital: ["A"-"Z"]. -letter: ["A"-"Z"; "a"-"z"]. insertion: -"+", s, (string; -"#", hex), s.

Invisible XML Tester

Grammar Samples
Invisible XML Grammar Refer to Invisible XML Specification, Community Group Editorial Draft, 2024-08-20 When empty, iXML grammar is used as default value Syntax error in grammar
Clear XML Notation Compiled JSON for Nearley
Input This is the input text to be parsed Unsuccessful parsing

Clear Raw Parsing Result Indented Parsing Result