Is there any difference between DKIM Core and the actual DKIM ? I am not able to find any difference in the syntax:

http://dkimcore.org/specification.html#2
http://www.zytrax.com/books/dns/ch9/dkim.html#text

Which one is better? DKIM Core or DKIM ?

I use the TXT record in the following format in my DNS:
Code:
dkim._domainkey    "v=DKIM1\; t=s\; n=core\; p=AOEIEEUE...."
Is this DKIM Core or DKIM ?


I understand that the "n=" is just a text, which is used in both DKIMCore and DKIM.

Code:
n= (notes) Optional. Defines human readable text that may be used by validating receiver administrators.
Please help me to understand better. Thanks.