1. Create XML file from some raw-data. ( format well specified)
2. Create serveral HTML files out of it
3. Add some more data to XML file in step 1. ( format well specified, but different than step 1)
4. Create/Update HTML files in step2 only with those data which are added in step 3.
5. Mark those HTML files which are created/updated.
6. Send the new files to the server.