Icarus Class: GuiField
Instruction to the graphical user interfaces to (and how to) display all values in the index in the query form.
name Attribute may stay unnamed in attribute list.
  Name of the GUI field.
type   menu
  menu checklist multiselect
  Type of field. 'menu' is a list (for example an HTML select list) where one item can be selected. 'checkList' is a set (for example HTML check boxes) where multiple values can be selected. 'multiselect' is a list (for example an HTML select list) where more than one value can be selected.
valOverlap   n
  y n
  Specify 'y' if values can overlap.
visListHeight  
  Maximum number of visible items in a list, for example in a multi-select HTML list box before scrolling is forced.
maxKeys   100
  Maximum number of key values to select from in a checkbox list.