I previously wrote the following article, where I tried validating XML files using the JPCOAR schema.
This time, based on the verification from the above article, I created a validation tool using Google Colab. You can try it at the following URL.
You can validate target files by specifying the URL of a published XML file or by uploading a local file.
I hope this serves as a helpful reference when creating XML files using the JPCOAR Schema (v1).