Numbers of NAT-s in IPv4/IPv6 Network? One or more?

[Bilajbegovic Damir <damir.bilajbegovic@siemens.com>]

Case: local network connected to the public IP network

If I understood right, in normally network translation (local IPv4 to public
IPv4), there must be only one NAT (simplest solution) at the border of
network. (NAT-PT and all necessarily ALG)

If there is translation between IPv4 intranet and IPv6 public network can
then be more than NAT-PT? (all intranet is IPv4, and all public is IPv6)

If you know the answer or you can direct me to some document I would be
grateful.
         Damir Bilajbegovic

P.S: In translation IPv4/IPv6 there is always translation, and nor IPv4
user, nor IPv6 server do not see directly each other, they see IPv4 address
which NAT gives to server, and IPv6 server sees IPv6 address of user by
which NAT represents user. Every packet will go directly to specific NAT
(the one who knows translation parameters of connection). So, I do not see
any problem in translation. I'm I wrong.