Need correct approach for XDM schema mapping

Hi Team, 

please refer to the below image

Under the product list items array in XDM schema
there are individual line items related to product
as well as custom dimensions under experience, where we are mapping the same product information (product id, product name, product sku, cart value etc.,) to the custom eVars

is this a correct approach ? will this not increment or pollute the data in Adobe analytics reports ? Please share your thoughts

Thanks,