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2.1.5.2 char Identifier[23] Unless stated otherwise in this document this field shall be set to an identifier that uniquely identifies the implementation. This methodology will allow for identification of the implementation responsible for creating structures recorded on media interchanged between different implementations. If an implementation updates existing structures on the media written by other implementations the updating implementation shall set the Identifier field to a value that uniquely identifies the updating implementation. The following table summarizes the Entity Identifier fields defined in the ECMA 167 standard and this document and shows to what values they shall be set. Entity Identifiers Descriptor Field ID Value Suffix Type Primary Volume Descriptor Implementation ID “*Developer ID” Implementation Identifier Suffix Primary Volume Descriptor Application ID “*Application ID” Application Identifier Suffix Implementation Use Implementation “*UDF LV Info” UDF Identifier Suffix Volume Descriptor Identifier Implementation Use Volume Descriptor Implementation ID (in Implementation “*Developer ID” Implementation Identifier Suffix Use field) Partition Descriptor Implementation ID “*Developer ID” Implementation Identifier Suffix Partition Descriptor Partition Contents “+NSR03” Application Identifier Suffix Logical Volume Descriptor Implementation ID “*Developer ID” Implementation Identifier Suffix Logical Volume Descriptor Domain ID "*<strong>OSTA</strong> UDF Compliant" DOMAIN Identifier Suffix File Set Descriptor Domain ID "*<strong>OSTA</strong> UDF Compliant" DOMAIN Identifier Suffix File Identifier Descriptor Implementation Use “*Developer ID” Implementation Identifier Suffix (optional) File Entry Implementation ID “*Developer ID” Implementation Identifier Suffix Device Specification Extended Attribute Implementation IDUse “*Developer ID” Implementation Identifier Suffix UDF Implementation Use Extended Attribute Implementation ID See 3.3.4.5 UDF Identifier Suffix Non-UDF Implementation Use Extended Attribute UDF Application Use Extended Attribute Implementation ID “*Developer ID” Implementation Identifier Suffix Application ID See 3.3.4.6 UDF Identifier Suffix UDF 2.01 15 March50 April
Non-UDF Application Use Extended Attribute UDF Unique ID Mapping Data Power Calibration Table Stream Logical Volume Integrity Descriptor Application ID “*Application ID” Application Identifier Suffix Implementation ID “*Developer ID” Implementation Identifier Suffix Implementation ID “*Developer ID” Implementation Identifier Suffix Implementation ID “*Developer ID” Implementation (in Implementation Identifier Suffix Use field) Implementation ID N/A N/A Partition Integrity Entry Virtual Partition Map Partition Type “*UDF Virtual UDF Identifier Suffix Identifier Partition” Virtual Allocation Implementation Use “*Developer ID” Implementation Table Identifier Suffix (optional) Sparable Partition Partition Type “*UDF Sparable UDF Identifier Suffix Map Identifier Partition” Sparing Table Sparing Identifier “*UDF Sparing UDF Identifier Suffix Table” Metadata Partition Partition Type “*UDF Metadata UDF Identifier Suffix Map Identifier Partition” NOTE: The value of the Entity Identifier field is interpreted as a sequence of bytes, and not as a dstring specified in CS0. For ease of use the values used by UDF for this field are specified in terms of ASCII character strings. The actual sequence of bytes used for the Entity Identifiers defined by UDF are specified in section 6.2. NOTE: In the ID Value column in the above table “*Application ID” refers to an identifier that uniquely identifies the writer’s application. In the ID Value column in the above table “*Developer ID” refers to an Entity Identifier that uniquely identifies the current implementation. The value specified should be used when a new descriptor is created. Also, the value specified should be used for an existing descriptor when anything within the scope of the specified EntityID field is modified. NOTE: The value chosen for a “*Developer ID” should contain enough information to identify the company and product name for an implementation. For example, a company called XYZ with a UDF product called DataOne might choose “*XYZ DataOne” as their developer ID. Also in the suffix of their developer ID they may choose to record the current version number of their DataOne product. This information is extremely helpful when trying to determine which implementation wrote a bad structure on a piece of media when multiple products from different companies have been recording on the media. UDF 2.01 16 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 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 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
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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 {
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would be considered writable if the
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3.3.3.5 byte Extended Attributes Se
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ignored and the file creation time
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3.3.4.5.1.1 FreeEASpace This extend
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MacVolumeInfo format RBP Length Nam
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UDFFXInfo format (Volume IV, page 1
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The ApplicationUse area for this ex
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stream directory. If present, there
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Since the streams listed above have
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Object Logical Block Number is the
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mechanism for the host software to
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Vendor ID - The Vendor ID reported
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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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