OptionalbaseID/handle of the base UCS when this UCS is orthographic; assumed to be WORLD if absent (DXF group 346)
Elevation of this UCS (DXF group 146)
OptionalextensionThe objectId of the extension dictionary owned by the object. If the object does not own an extension dictionary, then the returned objectId is set to undefined.
Whether this UCS is orthographic (DXF group 79)
The name of the symbol table record
OptionalobjectUnique identifier for the object
UCS origin
OptionalorthographicOrigin for orthographicType relative to this UCS (DXF groups 13/23/33)
OptionalorthographicOrthographic type paired with orthographicOrigin: 1=Top, 2=Bottom, 3=Front, 4=Back, 5=Left, 6=Right (DXF group 71)
OptionalownerIdentifier of the object that owns this object
Standard flags (group 70)
UCS X axis direction
UCS Y axis direction
Attributes for a UCS table record.