Not a valid XML schema
Luigi's Box onboarding can currently pull data out of these XML data schemas:
Google Merchant / Atom
https://support.google.com/merchants/answer/160593?hl=en
Google Merchant / RSS
Heureka (mostly used in Central European markets)
https://sluzby.heureka.sk/napoveda/xml-feed/
Luigi's Box
https://docs.luigisbox.com/indexing/feeds.html
We cannot currently use any other format/schema in the onboarding process. If you don't have a feed in one of the supported formats, contact us at support@luigisbox.com, and we'll validate your feed and set it up for you.