DICOM PS3.5 2019b - Data Structures and Encoding

6.2.3 URI/URL (UR) Value Representation

The URI/URL (UR) VR uses a subset of the Default Character Repertoire as defined in [RFC3986], and shall not use any code extension or replacement techniques. URI/URL domain name components that in their original form use characters outside the permitted character set shall use the Internationalized Domain Names for Applications encoding in accordance with IETF RFC5890 and RFC5891. Other URI/URL content that uses characters outside the permitted character set shall use the Internationalized Resource Identifiers encoding mechanism of IETF RFC 3987, representing the content string in UTF-8 and percent encoding characters as required.

Note

For example, the use of a patient name in a URI/URL string may require use of the [RFC3987] technique.

DICOM PS3.5 2019b - Data Structures and Encoding