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2.3.2 File Set Descriptor struct FileSetDescriptor { /* ECMA 167 4/14.1 */ struct tag DescriptorTag; struct timestamp RecordingDateandTime; Uint16 InterchangeLevel; Uint16 MaximumInterchangeLevel; Uint32 CharacterSetList; Uint32 MaximumCharacterSetList; Uint32 FileSetNumber; Uint32 FileSetDescriptorNumber; struct charspec LogicalVolumeIdentifierCharacterSet; dstring LogicalVolumeIdentifier[128]; struct charspec FileSetCharacterSet; dstring FileSetIdentifer[32]; dstring CopyrightFileIdentifier[32]; dstring AbstractFileIdentifier[32]; struct long_ad RootDirectoryICB; struct EntityID DomainIdentifier; struct long_ad NextExtent; struct long_ad SystemStreamDirectoryICB; byte Reserved[32]; } Only one FileSet descriptor shall be recorded. On WORM media, multiple FileSets may be recorded. The UDF provision for multiple File Sets is as follows: • Multiple FileSets are only allowed on WORM media. • The default FileSet shall be the one with the highest FileSetNumber. • Only the default FileSet may be flagged as writable. All other FileSets in the sequence shall be flagged HardWriteProtect (see 2.1.5.3). • No writable FileSet shall reference any metadata structures which are referenced (directly or indirectly) by any other FileSet. Writable FileSets may, however, reference the actual file data extents. Within a FileSet on WORM, if all files and directories have been recorded with ICB strategy type 4, then the DomainID of the corresponding FileSet Descriptor shall be marked as HardWriteProtected. The intended purpose of multiple FileSets on WORM is to support the ability to have multiple archive images on the media. For example one FileSet could represent a backup of a certain set of information made at a specific point in time. The next FileSet could represent another backup of the same set of information made at a later point in time. UDF 2.01 49 March50 April
2.3.2.1 Uint16 InterchangeLevel Interpreted as specifying the current interchange level (as specified in ECMA 167 4/15), of the contents of the associated file set and the restrictions implied by the specified level. Shall be set to a level of 3. An implementation shall enforce the restrictions associated with the specified current Interchange Level. 2.3.2.2 Uint16 MaximumInterchangeLevel Interpreted as specifying the maximum interchange level of the contents of the associated file set. This value restricts to what the current Interchange Level field may be set. Shall be set to level 3. 2.3.2.3 Uint32 CharacterSetList Interpreted as specifying the character set(s) specified by any field, whose contents are specified to be a charspec, of any descriptor specified in Part 4 of ECMA 167 and recorded in the file set described by this descriptor. Shall be set to indicate support for CS0 only as defined in 2.1.2. 2.3.2.4 Uint32 MaximumCharacterSetList Interpreted as specifying the maximum supported character set in the associated file set and the restrictions implied by the specified level. Shall be set to indicate support for CS0 only as defined in 2.1.2. 2.3.2.5 struct charspec LogicalVolumeIdentifierCharacterSet Interpreted as specifying the d-characters allowed in the Logical Volume Identifier field. Shall be set to indicate support for CS0 as defined in 2.1.2. 2.3.2.6 struct charspec FileSetCharacterSet Interpreted as specifying the d-characters allowed in dstring fields defined in Part 4 of ECMA 167 that are within the scope of the FileSetDescriptor. Shall be set to indicate support for CS0 as defined in 2.1.2. UDF 2.01 50 March50 April
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Universal Disk Format ® Specificat
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REVISION HISTORY 1.00 October 24, 1
Page 6 and 7:
CONTENTS 1. INTRODUCTION ..........
Page 8 and 9: 6.4 OSTA Compressed Unicode Algorit
Page 10 and 11: 1. Introduction The OSTA Universal
Page 12 and 13: 1.2 Compliance This document requir
Page 14 and 15: Media Block Address NOTE 1: This is
Page 16 and 17: 1.3.3 Terms May Optional Shall Shou
Page 18 and 19: non-overlapping Partitions with 2 p
Page 20 and 21: 2.1 Part 1 - General 2.1.1 Characte
Page 22 and 23: length of the field. The characters
Page 24 and 25: 2.1.5.2 char Identifier[23] Unless
Page 26 and 27: The Suffix Type column in the above
Page 28 and 29: For an Application Entity Identifie
Page 30 and 31: 2.2 Part 3 - Volume Structure 2.2.1
Page 32 and 33: NOTE: This field is used to determi
Page 34 and 35: 2.2.4 Logical Volume Descriptor str
Page 36 and 37: 2.2.5 Unallocated Space Descriptor
Page 38 and 39: EntityID. The scope of this EntityI
Page 40 and 41: 2.2.7.2.2 dstring LogicalVolumeIden
Page 42 and 43: Layout of Type 2 partition map for
Page 44 and 45: • Bits 1-7: Reserved. Shall be se
Page 46 and 47: Virtual Allocation Table structure
Page 48 and 49: the offset and length of a partitio
Page 50 and 51: The Metadata Partition Map (see2.2.
Page 52 and 53: 2.2.13.1 Metadata File (and Metadat
Page 54 and 55: 2.2.13.4 Procedure for de-allocatin
Page 56 and 57: } struct EntityID byte byte Impleme
Page 60 and 61: 2.3.2.7 struct EntityID DomainIdent
Page 62 and 63: In order to assist a UDF implementa
Page 64 and 65: 2.3.5.1 Uint16 StrategyType The co
Page 66 and 67: 2.3.6 File Entry struct FileEntry {
Page 68 and 69: 2.3.6.8 FileLinkCount Hard links to
Page 70 and 71: Descriptors should be used. For exa
Page 72 and 73: 2.3.11.2 Uint32 PreviousAllocationE
Page 74 and 75: 3.2 Part 3 - Volume Structure 3.2.1
Page 76 and 77: 3.3 Part 4 - File System 3.3.1 File
Page 78 and 79: 3.3.2.1.2 Macintosh Bits 6 & 7 (Set
Page 80 and 81: 3.3.3 File Entry struct FileEntry {
Page 82 and 83: would be considered writable if the
Page 84 and 85: 3.3.3.5 byte Extended Attributes Se
Page 86 and 87: ignored and the file creation time
Page 88 and 89: 3.3.4.5.1.1 FreeEASpace This extend
Page 90 and 91: MacVolumeInfo format RBP Length Nam
Page 92 and 93: UDFFXInfo format (Volume IV, page 1
Page 94 and 95: The ApplicationUse area for this ex
Page 96 and 97: stream directory. If present, there
Page 98 and 99: Since the streams listed above have
Page 100 and 101: Object Logical Block Number is the
Page 102 and 103: mechanism for the host software to
Page 104 and 105: Vendor ID - The Vendor ID reported
Page 106 and 107: The OS2EA Stream contains a table o
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4.2.2 File Identifier Descriptor st
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Definitions: A FileIdentifier shall
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3. Invalid Characters: A FileIdenti
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4. Trailing Periods and Spaces: All
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If there is a file extension then t
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defined as space that is not direct
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UDF 2.01 111 March50 April
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6.2 UDF Entity Identifier Values En
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8 0 BeOS - generic 9 0 Windows CE -
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} } returnValue = unicodeIndex; } r
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} return crc; #ifdef MAIN unsigned
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6.6 Algorithm for Strategy Type 409
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nameLen = udfNameLen; } else { /* A
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} needsCRC = TRUE; /* Append the CR
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if (index < udfLabelLen || index ==
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UDF 2.01 129 March50 April
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unicode_t *udfName, /* (Input) Name
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} #ifdef (OS2 | WIN_95 | WIN_NT) /*
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6.8 Extended Attribute Checksum Alg
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• The data of each file shall be
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Read the File Identifier Descriptor
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• An intermediate state is allowe
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• The host shall perform read/mod
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6.10.2.6.3 Level 3 No restrictions
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ISO 9660 converted to UDF 1 st sess
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For File Structure: 5. Unallocated
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6.13 Recommendations for DVD+R and
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6.13.1.4.2 Anchor Volume Descriptor
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6.13.2.1 Requirements • The packe
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6.126.15 UDF Media Format Revision
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Description DCN Updated in UDF Revi
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Registration Form Disk Format Speci
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L Logical Block Size, 8, 9, 2425 Lo
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