[Zope] Invalid Characters for a URL?

[Edward Pollard]

I'm porting some data to a Zope environment, and it is critical that 
URL's remain the same.

However, Zope does not allow plus signs (+) in URL's. It tries to pass 
it off that plus is an invalid character for a URL. However, plus is a 
perfectly valid character for a URL (ref: 
http://www.ietf.org/rfc/rfc1738.txt).

So, why is Zope doing this, and much more importantly what does Zope 
think ARE valid characters for a URL?

---
Edward J. Pollard
University of Lethbridge
Web Development