xml-canonicalization 0.1.0

InputString = {
  SOI ~
  (CharacterReference | CharacterThatMightNeedChanging | Character)* ~
  EOI
}

CharacterReference = ${
  ("&" ~ WellKnownRef ~ ";") |
  ("&#" ~ DecimalRef ~ ";") |
  ("&#x" ~ HexadecimalRef ~ ";")
}

WellKnownRef = @{
  "amp" | "lt" | "gt" | "apos" | "quot"
}

DecimalRef = @{
  ('0'..'9')+
}

HexadecimalRef = @{
  ('0'..'9' | 'a'..'f' | 'A'..'F')+
}

CharacterThatMightNeedChanging = @{
  "\"" | ">" | "\x0D" | "\x09" | "\x0A"
}

Character = @{
  ANY
}