Introduced in DXF version R13 (AC1012), dxftype is XLINE.
A line that extents to infinity in both directions, used as construction line. Create XLine in layouts and
blocks by factory function add_xline().
Common DXF Attributes for DXF R13 or later
Location point of line as (3D Point in WCS)
Unit direction vector as (3D Point in WCS)