linetype defines the rendering pattern
of linear graphical entities like LINE, ARC, CIRCLE and so on.
The linetype of an entity can be specified by the DXF attribute
this can be an explicit named linetype or the entity can inherit its linetype
from the assigned layer by setting
which is also the default value.
CONTINUOUS is the default linetype for
layers with an unspecified linetype.
Ezdxf creates several standard linetypes, if the argument setup is
new(), this simple linetypes are supported by all
doc = ezdxf.new('R2007', setup=True)
In DXF R13 Autodesk introduced complex linetypes which can contain text or shapes.
Autodesk Knowledge Network: About Linetypes
BricsCAD Help Center: Entity Linetype