article
book
url
copy
multimedia
notes


article
-------
category (article)	<----- show on main 
title			<----- show on main
journal
year
volume
author(s)		<----- show on main
subject
keywords		<----- show on main
summary

book
----
category (book)		<----- show on main
title			<----- show on main		
author(s)		<----- show on main
publisher
subject
keywords		<----- show on main
summary

url
---
category (url)		<----- show on main
title			<----- show on main
url			<----- show on main
keywords
description		<----- show on main

copy
----
category (copy)		<----- show
subject			<----- show
keywords
body

multimedia
----------
category (multimedia)	<----- show
description		<----- show
keywords
content

notes
-----
category (notes)	<---- show
subject			<---- show
keywords		<---- show
body