How do I just download XML files while following links in HTML pages (html,
htm, php, jsp, /, etc.)?
I have tried the following inefficient (perhaps wrong) filter:

-*
+mrdata.usgs.gov/*
+tin.er.usgs.gov/*
+*.xml
+*/*metadata*
-mime:*/*
+mime:text/html
+mime:text/xml
-*.kmz -*.kml
-*.gif -*.jpg -*.png -*.tif -*.bmp
-*.zip -*.tar -*.tgz -*.gz -*.rar -*.z -*.exe
-*.mov -*.mpg -*.mpeg -*.avi -*.asf -*.mp3 -*.mp2 -*.rm -*.wav -*.vob -*.qt
-*.vid -*.ac3 -*.wma -*.wmv