Header

SegVersion

SegSize

IsCompoundFile

Diagnostics

Files

Attributes

IndexSort

Footer

Created.major

Created.minor

Created.bugfix

标志位

Min.major

Min.minor

Min.bugfix

NumSortFields

SortedField

SortedField

... ...

FieldName

SortTypeID

Selector

NumericType

Selector

Reverse

缺失值标志位

缺失值

u79_seg0

SortTypeID = 5

SortTypeID = 6

索引文件.si