The key-value pairs then follow, one per line. They consist of a parameter name (or key), follows by a colon, and then the value. As an example, a valid group looks like,
[ global ] vertical resolution (m): 0.05 x resolution (m): 10000 y resolution (m): 100
global
. For this group, we've set the values for three parameters. There can be any number of groups or key-value pairs per file. In fact, the same group name can appear in the same file more than once. The data are not overwritten but a new instance of the group created. However, in some instances it may not make sense to have multiple occurances of a group.