HeaderSection
CustomVars
ClassesSection
DXFClass
DXFClass.dxf.name
DXFClass.dxf.cpp_class_name
DXFClass.dxf.app_name
DXFClass.dxf.flags
DXFClass.dxf.instance_count
DXFClass.dxf.was_a_proxy
DXFClass.dxf.is_an_entity
TablesSection
BlocksSection
EntitySection
ObjectsSection