100

Subclass marker (AcDbUCSTableRecord)

2

UCS name

70

Standard flag values (See "Common Group Codes for Symbol Table Entries.")

10

Origin (in WCS). DXF: X value; APP: 3D point

20, 30

DXF: Y and Z values of origin (in WCS)

11

X-axis direction (in WCS). DXF: X value; APP: 3D vector

21, 31

DXF: Y and Z values of X-axis direction (in WCS)

12

Y-axis direction (in WCS). DXF: X value; APP: 3D vector

22, 32

DXF: Y and Z values of Y-axis direction (in WCS)