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. For example, the German München (English: Munich) is encoded as Mnchen-3ya.
国际化域名编码（英語：Punycode）是一种表示Unicode码和ASCII码的有限的字符集。例如中文“上海”会被编码为“fhqz97e”。 Punycode的目的是在于国际化域名标签（IDNA）的框架中，使这些（多语言）的域名可以编码为ASCII。编码语法在文档 RFC 3492 中规定。
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).