It means it is a static analysis. The user chooses those options that are relevant for a particular analysis. Each option is introduced by a keyword card . If the option requires data cards, they follow the keyword card. Keywords may have parameters.
Many parameters are optional.
Parameters may have values. Any number of comment cards can be placed anywhere in the data file. Figure 2 shows the simple example problem being analysed. Figure 3 shows the finite element mesh used for the analysis. First number in each line is the node number and this is followed by the x and y co-ordinates.