The following extensions are made to the ISO9660 standard.

Table 3.10 Information for system

byte position	type	Field name	Description
1-4 5-6 7 8 9 10-14	NM N 00	Owner ID Attributes Signature byte 1 Signature byte 2 File Number Reserved	Owner group ID, owner ID Attribute bits 'X' ($ 58) 'A' ($ 41) File number Reserved area

(5) Attribute bit

Table 3.11 Attribute bits

bit position	Field name	Description
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15	Owner Read Reserved Owner execute Reserved Group read Reserved Group execute Reserved World read Reserved World execute File contains Form 1 sectors File contains Form 2 sectors File contains interleaved sector CD-DA file Directory	Includes Form 1 sector Includes Form 2 sectors Includes interleaved sectors CD-DA file Directory file

Table 3.12 Path table record

byte position	type	Field name	Description
1 2 3-6 7-8 9- (8+ LEN_DI) 9 + LEN_DI	N N N N D1 00	Length of Directory Identifier Extended Attribute Record Length Location of Extent Parent Directory Number Directory Identifier Padding Field	Directory name length Extension attribute record length Extent head LSN Parent directory entry number Directory name Only when the directory name is odd