UR URI/URL

Definition

A string of characters that identifies a URI or a URL as defined in [RFC3986]. Leading spaces are not allowed. Trailing spaces shall be ignored. Data Elements with this VR shall not be multi-valued.

Attributes using UR

17 DICOM attributes declare this VR.

• (0002,0026) Source Presentation Address SourcePresentationAddress
• (0002,0027) Sending Presentation Address SendingPresentationAddress
• (0002,0028) Receiving Presentation Address ReceivingPresentationAddress
• (0008,010E) Coding Scheme URL CodingSchemeURL
• (0008,0120) URN Code Value URNCodeValue
• (0008,0407) Stored Instance Base URI StoredInstanceBaseURI
• (0008,0408) Folder Access URI FolderAccessURI
• (0008,0409) File Access URI FileAccessURI
• (0008,040B) Filename in Container FilenameInContainer
• (0008,1190) Retrieve URL RetrieveURL
• (0010,0047) Sex Parameters for Clinical Use Category Reference SexParametersForClinicalUseCategoryReference
• (0028,7FE0) Pixel Data Provider URL PixelDataProviderURL
• (0040,4073) Storage URL StorageURL
• (0040,E010) Retrieve URI RetrieveURI
• (0068,7005) Relative URI Reference Within Encapsulated Document RelativeURIReferenceWithinEncapsulatedDocument
• (0072,0071) Selector UR Value SelectorURValue
• (0074,100A) Contact URI ContactURI

Working with UR in integration code

VR-aware transformations are where most DICOM integration bugs hide — truncating a PN's 5-component structure, misaligning OB padding, or dropping leading zeros on IS. Saga IT builds production DICOM pipelines that respect VR semantics across Mirth Connect transformers, DIMSE gateways, and cloud DICOM services.