Many of the spring node attributes are the same as the options available in the  window. See Soft/Rigid Bodies > Create Springs.
         
          
              
            
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                     The number of springs in the object.
                      
 
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                     This attribute determines if the spring node needs to do ID/Index mapping. The default value is true for this attribute. If
                        users know that no particles died, it can be set to false. With the false value, the spring node will not do particle ID/Index
                        mapping and speed up the evaluation.
                      
 
 
          
              
            
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                     Opens the  for the current spring.