Allow multiple ProductSupply tags, contributor statements to be an array, allow further lookups for ProductFormFeature
Created by: conatus
Thanks so much for creating this library.
When parsing an Onix feed, we have multiple <productsupply> tags. We can also have multiple contributor statements. Also code 79, routes to code list 220 as well as 98. As per the routings here - https://onix-codelists.io/codelist/79 - not exhaustive!
This is valid Onix XML. We have fixed this in our fork.