|Cash-in||Payment made by the buyer to the Marketplace (CB, VISA, etc.).|
|Cash-out||Transfer made by the Marketplace to the Sellers.|
|Marketplace||A website offering items from different vendors/service providers.|
|Order||An order is composed of items, it corresponds to an order of the marketplace. Each item is associated with a seller.|
|Seller||A seller on the Marketplace, also called the provider.
Can be a company (holder of a business registration number) or an individual.