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Punycode is a representation of Unicode with the limited ASCII character subset used for Internet hostnames.Using Punycode, host names containing Unicode characters are transcoded to a subset of ASCII consisting of letters, digits, and hyphens, which is called the letter–digit–hyphen (LDH) subset.
With the exception of the information emoji (ℹ), the trademark emoji (™️) and the "m" emoji (Ⓜ️), [citation needed] for an emoji to work as a domain name, it must be converted into so-called "Punycode". Punycode is a character encoding method used for internationalized domain names (IDNs). This representation is used when registering ...
Example of Greek IDN with domain name in non-Latin alphabet: ουτοπία.δπθ.gr (Punycode is xn--kxae4bafwg.xn--pxaix.gr)An internationalized domain name (IDN) is an Internet domain name that contains at least one label displayed in software applications, in whole or in part, in non-Latin script or alphabet [a] or in the Latin alphabet-based characters with diacritics or ligatures.
This conversion is easily reversible; by definition, converting an IRI to an URI and back again will yield an IRI that is semantically equivalent to the original IRI, even though it may differ in exact representation. [7] Some protocols may impose further transformations; e.g. Punycode for DNS labels.
The domain name in the IRI is known as an ... Web and Internet software automatically convert the domain name into punycode usable by the Domain Name ...
It has full support for internationalized domain names (IDNs). You can enter domain names with native characters directly (no punycode conversion needed), and have an option to display native character or punycoded domain names anywhere in the user interface, and quickly switch between these modes.
To use Unicode in the domain part of email addresses, IDNA encoding must traditionally be used. Alternatively, SMTPUTF8 [3] allows the use of UTF-8 encoding in email addresses (both in a local part and in domain name) as well as in a mail header section. Various standards had been created to retrofit the handling of non-ASCII data to the ...
An internationalized country code top-level domain (IDN ccTLD) is a top-level domain with a specially encoded domain name that is displayed in an end user application, such as a web browser, in its native language script or a non-alphabetic writing system, such as Latin script (.us, .uk and .br), Indic script (. भारत) and Korean script (.