Another question about unresolved entities & XSL

A few weeks ago, I asked if there was a way for XSL to
ignore unresolved entities and was told no.

How about this - is there a way to:

     copy everything in one file to another file
     delete any unresolved entity from the copied file
     run standard XSL scripts on the copied file

without resorting to Emacs or Perl?  I'm dealing with a really big
file (so Emacs is painful) and I can't program (so Perl is right out).





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