11. The method of claim 1 wherein quantifying a relevance value of an event notification for a specific user further comprises: adjusting a relevance value of an event notification for a target user in proportion to a quantification, in the user profile information concerning the target user, of the target user's interest level in the file to which the event is directed, in a file type of the file to which the event is directed or in content of the file to which the event is directed.
11. The method of claim 1 wherein quantifying a relevance value of an event notification for a specific user further comprises: adjusting a relevance value of an event notification for a target user in proportion to a quantification, in the user profile information concerning the target user, of the target user's interest level in the file to which the event is directed, in a file type of the file to which the event is directed or in content of the file to which the event is directed. 12. The method of claim 11 wherein content of the file further comprises at least one of: content in a body of the file, content in a modification made to the file by a user, content in a comment made by a user concerning the file and metadata of the file.