set base to {name:"Rocket Skates", price:12.75, color:"yellow"}

set update to {price:15.25, color:"red", year:1974}

put "Base data: " & base
put "Update data: " & update

// replacing as an operator, to generate merged data on the fly:
put "Merged data: " & base replacing properties in update

// replace as a command, to modify base data in place:
replace properties of update in base
put "Base after update: " & base