${SED} "/<opt>/p
     /<opt>/d
     s/<dopt>/<lopt>/
     /<lopt>/p
     /<lopt>/d
     /<\/opt>/p
     /<abs>/p
     /<abs>/d
     /<\/abs>/p
     /<utils/p
     /<\/utils/p
     d" $1 > $2

