internationalized resource identifier (IRI) → διεθνοποιημένο αναγνωριστικό πόρου
uniform resource identifier (URI) → ενιαίο αναγνωριστικό πόρου
The Internationalized Resource Identifier (IRI) – is an internet protocol standard which extends the ASCII characters subset of the Uniform Resource Identifier (URI) protocol. It was defined by the Internet Engineering Task Force (IETF) in 2005 as a new internet standard to extend the existing URI scheme. The primary standard is defined by the RFC 3987. While URIs are limited to a subset of the ASCII character set, IRIs may contain characters from the Universal Character Set (Unicode/ISO 10646), including Chinese or Japanese kanji, Korean, Cyrillic characters, and so forth.
https://en.wikipedia.org/wiki/Internationalized_Resource_Identifier