Lines

1.	A line is a set of 2-node segments and can be defined:

•	explicitly, with segment connectivity

•

by box

•	by subsets, parts, properties or materials (all trusses and beams belonging to these entities are used to define the line)

•	by submodels (all trusses, beams and springs belonging to parts defined in the specified submodels are used to define the line)

•	by truss, beam or spring groups

•	by a surface (all lines of the surface are used)

•	by edges (edges of the surfaces are used)

•	with other lines