__WikiPageEvent__ is a subclass of WikiEvent that considers the processing of the page in terms of various "process phases," which are fired depending on whether one is viewing or editing pages, etc.  This event class defines the following event types:

* __pre-translate__ : fired during the filtering that occurs prior to translation
* __post-translate__ : fired after the filtering that occurs prior to translation
* __pre-save__ : fired prior to the point at which the page is saved to the repository
* __post-save__ : fired after the point at which the page is saved to the repository
* __lock__ : fired just prior to the page lock being requested
* __unlock__ : fired after the page lock has been released
* __page requested__ : fired prior to the page processing, just after the page has been requested
* __page delivered__ : fired after all page processing has been completed for a request
* __security event__ : covers the myriad of different security event types, fired at various times during login, etc.