ISO 9660
E18760
ISO 9660 is an international standard file system format primarily used for optical disc media such as CD-ROMs to ensure cross-platform data compatibility.
Observed surface forms (4)
| Surface form | As subject | As object |
|---|---|---|
| Compact Disc format | 0 | 1 |
| ISO 9660 (via handlers) | 0 | 1 |
| Primary Volume Descriptor | 0 | 1 |
| Volume Descriptor Set Terminator | 0 | 1 |
Statements (75)
| Predicate | Object |
|---|---|
| instanceOf |
ISO standard
→
file system standard → optical disc file system → |
| blockSize | 2048 bytes → |
| characterEncoding | ASCII → |
| dataOrganization | sectors and logical blocks → |
| defines |
directory structure for optical discs
→
file naming conventions for optical discs → volume descriptors for optical discs → |
| designedAs | read-only distribution format → |
| designedFor | cross-platform data compatibility → |
| directoryDepthLimit | 8 levels → |
| extendedBy |
El Torito
→
Joliet, Illinois →
surface form:
Joliet
Rock Ridge → |
| extension |
Apple ISO 9660 extensions
→
El Torito → Joliet, Illinois →
surface form:
Joliet
Rock Ridge → |
| fileExtension | .iso → |
| filenameCharacterSet |
digits 0–9
→
dot → underscore → uppercase Latin letters A–Z → |
| filenameLengthLimit |
31 characters in Level 2
→
8.3 format in Level 1 → |
| hasLevel |
Level 1
→
Level 2 → Level 3 → |
| hasLimitation |
limited directory depth
→
limited filename length → no native support for Unix permissions → no native support for symbolic links → restricted filename character set → |
| hasVolumeDescriptor |
Boot Record Volume Descriptor
→
ISO 9660 self-linksurface differs →
surface form:
Primary Volume Descriptor
Supplementary Volume Descriptor → ISO 9660 self-linksurface differs →
surface form:
Volume Descriptor Set Terminator
Volume Partition Descriptor → |
| improvedBy | UDF → |
| level1Feature |
8.3 filenames
→
single-extent files → |
| level2Feature | longer filenames up to 31 characters → |
| level3Feature | multi-extent files → |
| mediumType |
BD-R
→
BD-RE → BD-ROM → CD-R → CD-ROM → CD-RW → DVD+R → DVD+RW → DVD-R → DVD-ROM → DVD-RW → compact disc → |
| platformCompatibility |
Linux
→
Unix-like systems → Windows → macOS → |
| primaryUse |
CD-ROM
→
optical disc media → |
| publishedBy | International Organization for Standardization → |
| relatedStandard | ECMA-119 → |
| sectorSize | 2048 bytes → |
| standardNumber | ISO 9660 self-link → |
| supports | read-only file systems → |
| supportsDirectories | true → |
| supportsFileAttributes | limited → |
| supportsTimestamps | true → |
| usedFor |
CD-ROM data distribution
→
ISO image files → bootable optical discs → software installation media → |
| volumeIdentifierLengthLimit | 32 characters → |
Referenced by (8)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Compact Disc format
this entity surface form:
Primary Volume Descriptor
this entity surface form:
Volume Descriptor Set Terminator
this entity surface form:
ISO 9660 (via handlers)