[r6rs-discuss] Stateful codecs and inefficient transcoding

[Chris Hanson]

   Date: Tue, 31 Oct 2006 00:53:20 -0500
   From: William D Clinger <will at ccs.neu.edu>

   I am told that XML files can contain several different
   encodings of text,

This isn't true.  An XML file has exactly one text encoding, specified
at the beginning of the file, by a combination of the XML declaration
and an optional BOM for UTF-16/32 encodings.

An XML document may refer to one or more external parsed entities, and
those entities may use different encodings.  But an external parsed
entity is _not_ part of the same byte stream as the referring
document.