$ cat quat.xml
<?xml version='1.0' encoding='ISO-8859-1' ?>
<!DOCTYPE DEFJOB SYSTEM "/aa/em/ddd/e62xstf3/resource/defjob.dtd">
 <DEFJOB >
  <JOB
   GROUP="xp_maint"
   NODEID="localhost"
   USE_INSTREAM_JCL="0"
>
   <QUANTITATIVE NAME="QR1-INIT" QUANT="1" />
   <QUANTITATIVE NAME="QR2-NODEID" QUANT="1" />
   <QUANTITATIVE NAME="QR3-GROUP" QUANT="1" />
  </JOB>
</DEFJOB>


$ perl -MXML::Simple -le " print XMLout( XMLin( shift ), qw! RootName DEFJOB XMLDecl ! , qq[<?xml version=\x221.0\x22 encoding=\x22ISO-8859-1\x22 ?>\n<!DOCTYPE DEFJOB SYSTEM \x22/aa/em/ddd/e62xstf3/resource/defjob.dtd\x22>] )" quat.xml
<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE DEFJOB SYSTEM "/aa/em/ddd/e62xstf3/resource/defjob.dtd">
<DEFJOB>
  <JOB GROUP="xp_maint" NODEID="localhost" USE_INSTREAM_JCL="0">
    <QUANTITATIVE NAME="QR1-INIT" QUANT="1" />
    <QUANTITATIVE NAME="QR2-NODEID" QUANT="1" />
    <QUANTITATIVE NAME="QR3-GROUP" QUANT="1" />
  </JOB>
</DEFJOB>