Means of index types.

[Wang Penghui <wangpenghui@realss.com>]

       Hi all;


A very stupid question, i have read the admin guide in 
http://www.openldap.org. I could not understand what's the exactly means 
of the index types (pres eq approx sub none)?

Could anyone pick me up?
Sorry for the stupid question.

Thanks in advance!

Wang Penghui