# Method Standards.IDNA.to_ascii()

Method to_ascii

  `string to_ascii(string s, bool|void allow_unassigned, bool|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.