hello!
using the XML in: www.gbadat.altervista.org/no-intro.zip
after the download of the datset it lists some dats (like Atari Lynx) as "local", but other (like Atari 5200) as "new".
i checked more times the headers and XML tags, but i am not able to see the difference (except name and date) between 5200 and Lynx, to understand why Lynx works and 5200 not. :S