DICOM PS3.12 2024e - Media Formats and Physical Media for Media Interchange |
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The reader shall be able to read a logical format conforming to UDF and ISO 9660 file systems, as defined below.
The creator shall be able to create a logical format conforming to UDF or ISO 9660 file systems or both, as defined below.
No requirements are defined for an updater.
The intent of these requirements is to insist that a reader be able to read media created by any creator, but not to require that media created by a particular creator can necessarily be updated by a different updater.
The reader shall be able to read a logical format conforming to UDF 1.02 or 1.5 or 2.0 or 2.01, as required by the UDF 2.01 standard.
The creator shall be able to create a logical format conforming to any one of UDF 1.02 or 1.5 or 2.0 or 2.01.
Options or extensions defined in UDF are required or restricted as specified in the following sub-sections, and in the media specific sub-sections.
Though the names of the files within the DICOM File set are restricted by PS3.10, other files on the media may have longer file names.
For the UDF Primary Volume Descriptor, both the Interchange Level and Maximum Interchange Level shall always be set to 2.
This means that the volume is not and will never be, part of a multi-volume set.
The Interchange Level and Maximum Interchange Level in the File Set Descriptor are defined by UDF to always be 3. This is despite the fact that restrictions specified for the DICOM File-set may be very similar to lower Interchange Levels specified in ECMA 167.
Creators and updaters may or may not write UDF Virtual Partition Maps and Virtual Allocation Tables depending on the appropriate choice for physical media.
All readers are required to support UDF Virtual Partition Maps and Virtual Allocation Tables.
Creators and updaters may or may not write UDF Sparable Partition Maps and Sparing Tables depending on the appropriate choice for physical media, since defect management may or may not be performed in the drive.
All readers are required to support UDF Sparable Partition Maps and Sparing Tables.
The reader shall not depend on any system dependent requirements as specified in UDF to be able to read the DICOM File-set, and shall not behave differently if they are present. Any unrecognized system dependent requirements shall be gracefully ignored.
Creators and updaters writing to a version of UDF that supports Named Streams shall use the default stream to write each file within the DICOM File-set.
Creators and updaters shall always create permissions for files within the DICOM File Set such that all users may read, write and delete all files, and all users may access and delete all directories on all systems.
The UDF File Identifier Descriptor for files within the DICOM File Set shall not specify a File Characteristic of "hidden."
DICOM PS3.12 2024e - Media Formats and Physical Media for Media Interchange |
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