The separator may be a tabulator or space, but do not use characters present in the Comments Field. Structure the file with the buttons in the middle. Vertical lines indicate the length of coloumn. You can set the structure column by column. Skip has to be assigned to all ID and unimportant fields.
Comment has to be assigned to all important comment fields.
If you make a mistake or want to start structuring again press the Clear button. ProSITE always shows the current structured file in the Preview Window. ProSITE lets you proceed to display if your specified structure is a valid one, otherwise the OK button is disabled. For more details see Reference Manual. These data indicate 2D location of special points, such as edges of houses, trees, manholes, etc.