Code listings for blog post about generating and exporting catalog feeds from EPiServer Commerce. Read about it here: https://stefanolsen.com/posts/on-exporting-product-catalogs-to-google-or-facebook/

GoogleFeedMapping.xml

<FieldMapping xmlns="http://stefanolsen.com/CatalogFeed.GoogleMerchant/MappingDocument.xsd">
  <ContentType CommerceType="CatalogNode">
    <Fields>
      <MappedField MetaField="GoogleProductCategoryId" FeedField="google_product_category"/>
    </Fields>
  </ContentType>
  
  <ContentType CommerceType="Product">
    <Fields>
      <MappedField MetaField="DisplayName" FeedField="title"/>
      <MappedField MetaField="Description" FeedField="description"/>
      <MappedField MetaField="Brand" FeedField="brand"/>
    </Fields>
    <ImageGroup AssetMetaField=""/>
  </ContentType>

  <ContentType CommerceType="Variation">
    <Fields>
      <MappedField MetaField="Code" FeedField="code"/>
      <MappedField MetaField="StopPublish" FeedField="expiration_date"/>
      <MappedField MetaField="Color" FeedField="color"/>
      <MappedField MetaField="Size" FeedField="size"/>

      <FixedField FeedField="condition" Value="new"/>
    </Fields>
  </ContentType>
</FieldMapping>