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Hello @slim3650,
Thank you for your question.
Our free version will only create Google product feeds you can use in the Merchant center. If the attribute naming convention from the feed is not important it looks like a Google feed would be sufficient.
If you need to name the attributes like the example (like price instead of g:price) you will need a different feed.
Our premium feed builder is able to create custom XML feeds where you are able to create your own attributes with the names you want.
Hope this helps.
Let me know if you need further assistance.