In your example http://docs.webix.com/samples/17_datatree/01_loading/02_xml_data.html using XML datasource renders just last child of root item. Is there a bug?
I can confirm the problem. There is a regression in XML parsing of hierarchical data structures. Fix will be included in Webix 1.6.1
Send me a message if you need the fixed build ASAP
I was just evaluating your framework and noticed this issue. I can wait for the next release.
Thank you!