2. The method as recited in claim 1 , wherein the primary type is selected from among: electronic mail message, instant message, fax message, voice message, and news group posting.
2. The method as recited in claim 1 , wherein the primary type is selected from among: electronic mail message, instant message, fax message, voice message, and news group posting. 4. The method as recited in claim 2 , wherein the act of adding protocol specific data fields from at least one protocol specific extension schema to the single message item itself comprises an act of adding protocol specific data fields from a POP3 protocol extension to the single message item, the POP3 protocol extension from an electronic mail POP3 extension schema.