UDF 2.00 - OSTA - Optical Storage Technology Association

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 (see 6.9.3). Support for
this extended attribute is optional.
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 3.3.8.2. 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 (3.3.8.2)
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
UDF 2.00 April 3, 1998
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