A target property is the address of a property name-value pair on the clipboard, in the context of a change to the value.
If the name-value pair does not already exist at that address, the system creates it, using the name of the property (part of the address) and the class of the page to locate the Rule-Obj-Property rule defining the property.
A syntax known as dot notation is used throughout PRPC for identifying references to target properties.