Is there any way to have a generic kickstart for all RHEL releases with full automation?

Issue

• Wanted to have a full automatic kickstart installation for both Red Hat Enterprise Linux 6 and 7.
• Don't want to specify the url option in kickstart for network installation because those will be different.
• Currently deploying kickstart infrastructure for a new environment, and would like to have a consolidated kickstart file that will support kernel and repo selection. For example, would like one kickstart file that supports kicking both Red Hat Workstation and Red Hat Server.