I'm working with the Magento SOAP API. Many of the methods will list entites and allow for filtering in the request - however I can find no information in the documentation about what filters are available to use.
I've found some documentation about the kinds of operators we can use, but I'm left guessing at the field names themselves. Perhaps this is considered obvious for Magento developers, but I have little familarity with the Magento core.
Is there a list anywhere of the various fields that can be used for filtering? Specifically I'm looking for sales order filters at present, but ideally I'd like a comprehensive list of every field that can be filtered on every API method that allows filtering.