Exporting Mesh to a NASTRAN ® File To specify the dimensions of the elements to export, to choose to include or exclude the geometric entity information, or to set the file field format or element order, enter model.mesh(<tag>).export().set(<property>,<value>); The following table lists the available properties: Table 4-8: Available NASTRAN Mesh Export Properties and their Valid Values. Property Value Default Description solidelem on | off on Specify if domain elements are exported. shellelem on | off off Specify if boundary elements are exported (3D only). geominfo on | off on Specify if geometric entity information for each element is exported. fieldformat small | large | free small Specify file field format. linear on | off off Specify if elements are exported as linear or second-order (quadratic) elements.