Suffix              File Type Description
-----------------   --------------------
.node2d             NODE2D 2D Node Data File                
                    A NODE2D file contains a list of node   
                    coordinates.                            
                    This file type uses a fixed file format
                    that is either a standard ASCII file
                    format or a binary format specific to
                    the file type.
 
.snode2d            SNODE2D 2D Source Node Data File        
                    An SNODE2D file contains a list of node 
                    coordinates and spacing function.       
                    This file type uses a fixed file format
                    that is either a standard ASCII file
                    format or a binary format specific to
                    the file type.
 
.vnode2d            VNODE2D 2D Directional Source Data File 
                    A VNODE2D file contains a list of node  
                    coordinates, spacing function, unit     
                    direction vector, and aspect-ratio.     
                    This file type uses a fixed file format
                    that is either a standard ASCII file
                    format or a binary format specific to
                    the file type.