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EntityID. The scope of this EntityID is the Logical Volume Descriptor, and the contents of the associated Logical Volume. This field allows an implementation to identify which implementation last modified the contents of a Logical Volume. Number of Files - The current number of files in the associated Logical Volume, including hard links. The count includes all FIDs in the directory hierarchy for which the Directory bit, Parent bit and Deleted bit are all ZERO. FIDs identifying a stream are not included in the count. This information is needed by the Macintosh OS. All implementations shall maintain this information. NOTE: This value does not include Extended Attributes or streams as part of the file count. Number of Directories - The current number of directories in the associated Logical Volume. This information is needed by, plus the Macintosh OS. All implementations shall maintain this information. NOTE: The root directory shall be included in the directory count. . The directory count doesincludes the root directory and all FIDs in the directory hierarchy for which the Directory bit is ONE and the Parent bit and Deleted bit are both ZERO. FIDs identifying a stream directory are not include stream directoriesincluded in the count. This information is needed by the Macintosh OS. All implementations shall maintain this information. Minimum UDF Read Revision - Shall indicate the minimum recommended revision of the UDF specification that an implementation is required to support to successfully be able to read all potential structures on the media. This number shall be stored in binary coded decimal format, for example #0150 would indicate revision 1.50 of the UDF specification. Minimum UDF Write Revision - Shall indicate the minimum revision of the UDF specification that an implementation is required to support to successfully be able to modify all structures on the media. This number shall be stored in binary coded decimal format, for example #0150 would indicate revision 1.50 of the UDF specification. Maximum UDF Write Revision - Shall indicate the maximum revision of the UDF specification that an implementation that has modified the media has supported. An implementation shall update this field only if it has modified the media and the level of the UDF specification it supports is higher than the current value of this field. This number shall be stored in binary coded decimal format, for example #0150 would indicate revision 1.50 of the UDF specification. Implementation Use - Contains implementation specific information unique to the implementation identified by the Implementation ID. UDF 2.01 29 March50 April
2.2.7 Implemention Use Volume Descriptor struct ImpUseVolumeDescriptor { /* ECMA 167 3/10.4 */ struct tag DescriptorTag; Uint32 VolumeDescriptorSequenceNumber; struct EntityID ImplementationIdentifier; byte ImplementationUse[460]; } This section defines an UDF Implementation Use Volume Descriptor. This descriptor shall be recorded on every Volume of a Volume Set. The Volume may also contain additional Implementation Use Volume Descriptors that are implementation specific. The intended purpose of this descriptor is to aid in the identification of a Volume within a Volume Set that belongs to a specific Logical Volume. NOTE: An implementation may still record an additional Implementation Use Volume Descriptor in its own format on the media. The UDF Implementation Use Volume Descriptor does not preclude an additional descriptor. 2.2.7.1 EntityID ImplementationIdentifier The Identifier field of this EntityID shall specify “*UDF LV Info”. Refer to section 2.1.5 on Entity Identifier. 2.2.7.2 bytes ImplementationUse[460] The implementation use area shall contain the following structure: struct LVInformation { struct charspec dstring dstring dstring dstring struct EntityID bytes } LVICharset, LogicalVolumeIdentifier[128], LVInfo1[36], LVInfo2[36], LVInfo3[36], ImplementationID, ImplementationUse[128]; 2.2.7.2.1 charspec LVICharset Interpreted as specifying the character sets allowed in the LogicalVolumeIdentifier and LVInfo fields. Shall be set to indicate support for CS0 only as defined in 2.1.2. UDF 2.01 30 March50 April
Page 1 and 2: Universal Disk Format ® Specificat
Page 3 and 4: 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 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 58 and 59: 2.3.2 File Set Descriptor struct Fi
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
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Vendor ID - The Vendor ID reported
Page 106 and 107:
The OS2EA Stream contains a table o
Page 108 and 109:
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
Page 118 and 119:
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
Page 130 and 131:
6.6 Algorithm for Strategy Type 409
Page 132 and 133:
nameLen = udfNameLen; } else { /* A
Page 134 and 135:
} needsCRC = TRUE; /* Append the CR
Page 136 and 137:
if (index < udfLabelLen || index ==
Page 138 and 139:
UDF 2.01 129 March50 April
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unicode_t *udfName, /* (Input) Name
Page 142 and 143:
} #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
Page 148 and 149:
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
Page 156 and 157:
ISO 9660 converted to UDF 1 st sess
Page 158 and 159:
For File Structure: 5. Unallocated
Page 160 and 161:
6.13 Recommendations for DVD+R and
Page 162 and 163:
6.13.1.4.2 Anchor Volume Descriptor
Page 164 and 165:
6.13.2.1 Requirements • The packe
Page 166 and 167:
6.126.15 UDF Media Format Revision
Page 168 and 169:
Description DCN Updated in UDF Revi
Page 170 and 171:
Registration Form Disk Format Speci
Page 172 and 173:
L Logical Block Size, 8, 9, 2425 Lo
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