'elem' <nr|!> <firstNode> .. <lastNode> 'be2'|'be3'|'tr3'|'tr6'|-> 'qu4'|'qu8'|'he8'|'he20'This keyword is used to define elements based on nodes and its type (see section Element Types in the appendix for the correct node-order). For example,
!
'' instead of a name.