SVN 1.5.x dump and relative externals

Hi devs,

as I see Subversion reaching its final soak, I have two question regarding
it:
1) I use dump for my method of backup, and with merge tracking I guess the
dump will receive some additions. If, due to some problem, I am forced to
go back to Svn 1.4.x server, will it be able to digest the new dumps
without problems?
2) Are relative externals "client side only", that is, to use them can I
mix 1.5 client with a 1.4 server?

Thank you for your answers and best regards,

---
  Miha Vitorovic
  Inženir v tehničnem področju
  Customer Support Engineer
   NIL Data Communications,  Tivolska cesta 48,  1000 Ljubljana,  Slovenia
   Phone +386 1 4746 500      Fax +386 1 4746 501     http://www.NIL.si
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