[ipv6hackers] IPv6 prefix changing

[Sara]

Hello,

I have a question  that may any of you knows the answer, I just heard about something related to prefix changing in IPv6. This means because of privacy routers also change their prefix during the time. but I could not find the document that I have read about that


, I searched on internet and found these RFCs but these are not what I am looking for
http://tools.ietf.org/html/rfc6164
http://tools.ietf.org/html/rfc4818
http://tools.ietf.org/html/rfc5942

Anybody can help and provide me a link to any references related to that?
Thank you,
Regards,
Sara