V.1.2 DICOM File ID Mapping

The ZIP encoding preserves the hierarchical structure for directories and files within directories. Each volume has a root directory that may contain references to both files and subdirectories. Subdirectories may contain reference to both files and other subdirectories.

V.1.2.1 File ID

PS 3.10 defines a DICOM File ID Component as a string of 8 characters from a subset of the G0 repertoire of ISO 8859.

Note: The use of long filenames is prohibited.

Filename extensions are not used in DICOM File ID Components, hence a File Identifier shall not contain a File Extension or the '.' that would precede such a File Extension.

The maximum number of levels of a pathname in a ZIP file-set shall be at most 8 levels, to comply with the definition of a DICOM File-set in PS 3.10.


One and only one DICOMDIR File shall be present. The DICOMDIR shall be at the root directory of the File-set.

Note: The reason for the DICOMDIR is to serve as a manifest so that the recipient knows the full list of instances intended to be sent.