HELP-Merge multiple XML into one training set

[llsnnn]

I wanted to use dpdata to merge multiple datasets (Same structure), but I didn't understand. For example, I have 10 XML files with a total of 100000 frames of data here, and now I want to generate a dataset and take 2000 of them as the test set. Sorry for not resolving this issue from the quick tutorial.

[llsnnn]

could i use this method？ #438

[llsnnn]

This method is ok! Although I don't know why one group couldn't be merged ....