U-label

The form of one part of an internationalized domain name (glossary)domain name A readable internet name made of labels separated by dots. Full definition of domain name as people read and type it, written in Unicode characters such as accented letters, Arabic or Chinese script. Software converts it to the matching A-label (glossary)A-label The ASCII form of an internationalized name part, starting with xn--. Full definition of A-label, which starts with xn--, before looking it up in the DNS (glossary)DNS Domain Name System The internet's directory that links domain names to computer addresses. Full definition of DNS.