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draft-ietf-idn-punycode-02 - Punycode: A Bootstring encoding of Unicode for Internationalized Domain Names in Applications (IDNA)

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IETF - Internet Engineering Task Force

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Punycode: A Bootstring encoding of Unicode for Internationalized Domain Names in Applications (IDNA)

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https://datatracker.ietf.org/doc/draft-ietf-idn-punycode/02/

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IETF Datatracker

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Punycode is a simple and efficient transfer encoding syntax designed for use with Internationalized Domain Names in Applications (IDNA). It uniquely and reversibly transforms a Unicode string into an ASCII string. ASCII characters in the Unicode string are represented literally, and non-ASCII characters are represented by ASCII characters that are allowed in host name labels (letters, digits, and hyphens). This document defines a general algorithm called Bootstring that allows a string of basic code points to uniquely represent any string of code points drawn from a larger set. Punycode is an instance of Bootstring that uses particular parameter values specified by this document, appropriate for IDNA. [STANDARDS-TRACK]

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