Thank you very much. This is an exellent start. I’m already reading and parsing a file. I see where I went wrong at the beginning: load_from_file was already parsing the file, attempting to parse further was redundant. I noticed this when I saw your return into a doc starting with parsing a data variable. I was already returning into a doc using load_from_file, so that was my data. Silly me.
Now to create and output to a new file the filtered data. Also will need to read in from a URL xml or gz data instead of loading from file. I’ll see if I can finger this out myself before asking ;).