At work I deal with a lot of ONIX xml files (About ONIX for Books Product Information Message: http://www.editeur.org/83/Overview/)<p>There are a lot of tools for xml-editing, currently I use the following ones, but i am interested if anyone knows different (and probably better) ones? I prefer open source software, but also commercial software is interesting:<p>https://notepad-plus-plus.org/ -
https://www.altova.com/de/xmlspy.html -
http://www.xmlcooktop.com/ -
https://marketplace.eclipse.org/content/eclipse-xml-editors-and-tools-0