set props {
  {{FileProp1} {FileProp1Value}}
  {{FileProp2} {FileProp1Value}}
}
begin_libp $props 0.001
set props {
  {{CellProp0} {CPValue0}}
  {{CellProp1} {CPValue}}
  {{CellProp2} {CPValue}}
}
begin_cellp $props {A}
box 1 2 {300 -400} {400 -200}
end_cell
end_lib