[Zope] CatalogAware & Catalog.

[Pattreeya Tanisaro]

Hello,
	I would like to know if it is possible to update "only" the new document 
instead of update the whole or update only specific type of object. I have 
tried with CatalogAware (i select CatalogAware as the base-class when I 
create a new type of Zclass.) but I still cannot keep track new document of 
that document type.  I have to update my catalog manually every time I add 
the new document.  From Zope Book about catagolizing content, it should work 
out but it didn't. I guess I did something wrong. When I add the new 
document,  how the Catalogaware work? Besides, I wonder if we can set the 
timer (maybe from the machine or system) for updating catalog automatically? 

				Thank you in advance for any answer.
						pattreeya.