Method Standards.IDNA.to_ascii()

Method to_ascii: string to_ascii(string s, int(0..1)|void allow_unassigned, int(0..1)|void use_std3_ascii_rules)
Description: The to_ascii operation takes a sequence of Unicode code points that make up one label and transforms it into a sequence of code points in the ASCII range (0..7F). If to_ascci succeeds, the original sequence and the resulting sequence are equivalent labels.
Parameter s: The sequence of Unicode code points to transform.
Parameter allow_unassigned: Set this flag if the the string to transform is a "query string", and not a "stored string". See RFC 3454.
Parameter use_std3_ascii_rules: Set this flag to enforce the restrictions on ASCII characters in host names imposed by STD3.