"Page creator" is a predefined property of type Page. This property is pre-deployed (also known as special property) and comes with additional administrative privileges but can be used just like any other user-defined property.
A
hw>Fbaeckmann
hw>Unknown user
hw>Unknown user
hw>Unknown user
hw>Unknown user
hw>Unknown user
hw>Unknown user
hw>Unknown user
hw>Unknown user
hw>Unknown user
hw>Unknown user
hw>Unknown user
hw>Unknown user
hw>Unknown user
hw>Unknown user
hw>Unknown user
hw>Unknown user
hw>Unknown user
hw>Unknown user
hw>Unknown user