```cmake
file( DOWNLOAD http://dl.dropbox.com/u/15135983/itk-doxygen-xml.tar.bz2
  ${ITKDoxygenXML_TEMP_DIR}/itk-doxygen-xml.tar.bz2 SHOW_PROGRESS
  )
```

Update the nightly xml URL.
user
```cmake
file( DOWNLOAD http://itk.org/files/NightlyDoxygen/InsightDoxygenDocXml.tar.gz
  ${ITKDoxygenXML_TEMP_DIR}/itk-doxygen-xml.tar.bz2 SHOW_PROGRESS
  )
```
assistant