Where to find documentation?

[MVS]

We are working on migrating from the XML feed submissions to the new listing API, but it seems that a large portion of the documentation is missing. For a ListingsItemPutRequest, this documentation states that the attributes object is required, but I can't find anywhere that shows what all of the various attributes are and what the data requirements are for each one. The closest I've found so far is this Excel sheet mapping the old XML fields to the JSON structure, but it still doesn't list the specifics.

For example, we were using <ShippingWeight unitOfMeasure="LB">0.19</ShippingWeight> to send the shipping weight, and the JSON equivalent is supposed to be the website_shipping_weight attribute. But when we submit the request, we receive a 90000900 error that says "The attributes are invalid." and points to website_shipping_weight, but it doesn't say what's wrong or how to fix it. I'm guessing it's related to the units, but I've tried "LB", "lb", "lbs", "pounds", and "pound", but the error remains. Is there documentation anywhere that lists the specifics, such as what units should be used?

[MVS]

Thanks to Seller Support, I was able to get the answer to this, so I'll share it here in case anyone else was wondering. You need to determine your product type, then query getDefinitionsProductType. In the response is a link to a JSON schema, which is what I was looking for.