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3.3.4.5.1.1 FreeEASpace This extended attribute shall be used to indicate unused space within the Extended Attributes Space. This extended attributes shall be stored as an Implementation Use Extended Attribute whose ImplementationIdentifier shall be set to: "*UDF FreeEASpace" The ImplementationUse area for this extended attribute shall be structured as follows: FreeEASpace format RBP Length Name Contents 0 2 Header Checksum Uint16 2 IU_L-2 Free EA Space bytes This extended attribute allows an implementation to shrink/grow the total size of other extended attributes without rewriting the complete Extended Attributes Space. The FreeEASpace extended attribute may be overwritten and the space re-used by any implementation that sees a need to overwrite it. 3.3.4.5.1.2 DVD Copyright Management Information This extended attribute shall be used to store DVD Copyright Management Information. This extended attribute shall be stored as an Implementation Use Extended Attribute whose ImplementationIdentifier shall be set to: "*UDF DVD CGMS Info" The ImplementationUse area for this extended attribute shall be structured as follows: DVD CGMS Info format RBP Length Name Contents 0 2 Header Checksum Uint16 2 1 CGMS Information byte 3 1 Data Structure Type Uint8 4 4 Protection System Information bytes This extended attribute allows DVD Copyright Management Information to be stored. The interpretation of this format shall be defined in the DVD specification published by the DVD Consortium (Format/Logo Licensing Corporation, see 6.9.3). 6.9.3. Support for this extended attribute is optional. UDF 2.01 79 March50 April
3.3.4.5.2 MS-DOS, Windows 95, Windows NT Ignored. Not supported. Extended attributes for existing files on the media shall be preserved. 3.3.4.5.3 OS/2 OS/2 supports an unlimited number of extended attributes, which shall be stored as a named stream as defined in 3.3.8.23.3.8.2. To enhance performance the following Implementation Use Extended Attribute will be created. 3.3.4.5.3.1 OS2EALength This attribute specifies the OS/2 Extended Attribute Stream (3.3.8.23.3.8.2) information length. Since this value needs to be reported back to OS/2 under certain directory operations, for performance reasons it should be recorded in the ExtendedAttributes field of the FileEntry. This extended attribute shall be stored as an Implementation Use Extended Attribute whose ImplementationIdentifier shall be set to: "*UDF OS/2 EALength" The ImplementationUse area for this extended attribute shall be structured as follows: OS2EALength format RBP Length Name Contents 0 2 Header Checksum Uint16 2 4 OS/2 Extended Attribute Length Uint32 The value recorded in the OS2ExtendedAttributeLength field shall be equal to the InformationLength field of the file entry for the OS2EA stream. 3.3.4.5.4 Macintosh OS The Macintosh OS requires the use of the following extended attributes. 3.3.4.5.4.1 MacVolumeInfo This extended attribute contains Macintosh volume information which shall be stored as an Implementation Use Extended Attribute whose ImplementationIdentifier shall be set to: "*UDF Mac VolumeInfo" The ImplementationUse area for this extended attribute shall be structured as follows: UDF 2.01 80 March50 April
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Universal Disk Format ® Specificat
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REVISION HISTORY 1.00 October 24, 1
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CONTENTS 1. INTRODUCTION ..........
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6.4 OSTA Compressed Unicode Algorit
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1. Introduction The OSTA Universal
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1.2 Compliance This document requir
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Media Block Address NOTE 1: This is
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1.3.3 Terms May Optional Shall Shou
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non-overlapping Partitions with 2 p
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2.1 Part 1 - General 2.1.1 Characte
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length of the field. The characters
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2.1.5.2 char Identifier[23] Unless
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The Suffix Type column in the above
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For an Application Entity Identifie
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2.2 Part 3 - Volume Structure 2.2.1
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NOTE: This field is used to determi
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2.2.4 Logical Volume Descriptor str
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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 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 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
Page 108 and 109: 4.2.2 File Identifier Descriptor st
Page 110 and 111: Definitions: A FileIdentifier shall
Page 112 and 113: 3. Invalid Characters: A FileIdenti
Page 114 and 115: 4. Trailing Periods and Spaces: All
Page 116 and 117: If there is a file extension then t
Page 118 and 119: defined as space that is not direct
Page 120 and 121: UDF 2.01 111 March50 April
Page 122 and 123: 6.2 UDF Entity Identifier Values En
Page 124 and 125: 8 0 BeOS - generic 9 0 Windows CE -
Page 126 and 127: } } returnValue = unicodeIndex; } r
Page 128 and 129: } 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 ==
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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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