Suricata

Hi,
I am using rule management tool pulled pork for suricata. Whatever community rules are getting extracted and modified to their name as ET and everything is going well , but before extracting by pulled pork the tar file community rules contains classification.conf and reference. Conf files and they are not getting extracted by pulled pork, so without those files I am getting undefined reference to URL, http etc errors it is showing. So I thought those files are necessary,so I would like to know these files will get changed for every rules file updation or for every suricata version release? And if you know how to get these two files from pulled pork itself can you please tell me..