19. The method of claim 18 , further comprising the first active document sending an erase request to a search engine in the event the first active document is deleted.
19. The method of claim 18 , further comprising the first active document sending an erase request to a search engine in the event the first active document is deleted. 20. The method of claim 19 , further comprising the first active document maintaining a reference list of search engines with which the first active document is registered.