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+++ This bug was initially created as a clone of Bug #734802 +++

This seems like a nice to have feature, so I wanted to forward it from rpm.org's trac (currently read-only):

From <http://rpm.org/ticket/56>:
,---
It would be nice when a special handling of '~' would be introduced to mark "negative" version tokens. E.g. so that

| foo-1.0~beta < foo-1.0

holds. This would simplify complicated rulesets which deal with such naming schemes by abusing %release for it. 
`---

Cloned for RHEL-6 as the koji builders need to support this before the feature can be used in Fedora (and eventually RHEL-7)

This request was not resolved in time for the current release.
Red Hat invites you to ask your support representative to
propose this request, if still desired, for consideration in
the next release of Red Hat Enterprise Linux.

This request was erroneously removed from consideration in Red Hat Enterprise Linux 6.4, which is currently under development.  This request will be evaluated for inclusion in Red Hat Enterprise Linux 6.4.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHBA-2013-0461.html