Set FORMAT=MATRIX INPUT (default) to specify that the output use the matrix input text
format that is consistent with the format used by the matrix definition
technique in Abaqus/Standard.
Set FORMAT=LABELS to specify that the output use the standard labeling format.
Set FORMAT=COORDINATE to specify that the output use the common mathematical
coordinate format.
Set FORMAT=DMIG to specify that the output use the NASTRAN
DMIG-s format.
Set FORMAT=USER ELEMENT to specify the output format for use under the
MATRIX option for symmetric or unsymmetric linear user elements.