Hi Ivan,
thanks for the hint, that was the last missing piece in the puzzle. This is the workflow now:
The loop output is the same as the loop input, except there’s an extra column from the Java Snippets that holds the information whether or not the xml is valid (1 = yes, 0 = no). Zeros will be put on the naughty list. Now that I’m writing this, I had the idea of using an Constant Value Column Node instead, but I’m not retaking the screenshot
The XMLvalidator is super slow (can’t expect it to be fast tbh) so I’ll put filter mechanisms in front of it to prevent xmls getting validated multiple times. If there’re other performance tweaks, let me know.
Thank you @ipazin and @jpfeuffer for helping me. =)
Cheers, Thyme