XDR

from The Free On-line Dictionary of Computing (8 July 2008)

eXternal Data Representation
XDR

   (XDR) A {standard} for machine independent data structures
   developed by {Sun Microsystems} for use in {remote procedure
   call} systems.  It is defined in {RFC 1014} and is similar to
   {ASN.1}.

   (1994-12-13)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

XDR
       eXternal Data Representation (ONC, RPCL, Sun, RFC 1832)