Subject: about rfc2585.txt

From: "gang cao" <[email-masked]>
Date: Mon, 24 May 1999 10:39:30 +0800

in section 2 and section 3 first paragraph:
   Within certificate extensions and CRL extensions, the URI form of
   GeneralName is used to specify the location where issuer certificates

   and CRLs may be obtained.

what is the certificate and CRL meaning?
if i need get someone certificate , how can i get the certificate
extensions?
if i need get CRL , how can i get the CRL extensions?