On: Buying a single character domain – and 3 character...

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For your weekend reading pleasure:

Internationalized Domain Names (IDN) FAQ (https://unicode.org/faq/idn.html)

Unicode® Technical Standard #46: UNICODE IDNA COMPATIBILITY PROCESSING (https://www.unicode.org/reports/tr46/)

Internationalized Domain Names for Applications (IDNA): Background, Explanation, and Rationale (http://tools.ietf.org/html/rfc5894)

Internationalized Domain Names for Applications (IDNA): Definitions and Document Framework (http://tools.ietf.org/html/rfc5890)

Internationalized Domain Names in Applications (IDNA) Protocol (http://tools.ietf.org/html/rfc5891)

The Unicode Code Points and Internationalized Domain Names for Applications (IDNA) (http://tools.ietf.org/html/rfc5892)

Right-to-Left Scripts for Internationalized Domain Names for Applications (IDNA) (http://tools.ietf.org/html/rfc5893)