Difference between product and commodity SKU SPU What's the difference between key attributes? What's the product attribute?

Products
Taobao standardized products, by the class of the key attributes unique to determine. such as: Mobile phone category, the key attributes are brand and model, Nokia N95 is a product, Nokia is the brand, N95 is the model.

Products include both sales and Non-critical properties in addition to key properties.

Reference:

such as "Nokia N95" is a product. A unique product is determined through a combination of class-purpose key attributes.

Background standard class leaf node, a group of common characteristics of the combination of goods (for example: Cosmetics + Avon + Moisturizing single product + capacity), belonging to the same product can be considered to consumers of the utility and use of the feeling is no difference.

Commodity
The baby that Taobao says, a combination of instantiated objects for SPU, sales attributes (+sku)

Spu=standard Product Unit is standardized.
The SPU is equivalent to a product, as described in the product definition.

Sku

Key properties

Key attributes: The ability to verify the attributes of a unique product, can be one, or a combination of multiple key attributes.

Reference:

For example, the mobile phone's "brand" "model" can determine the only product, clothing "brand" "Item number" can determine the only product.

How to determine what key attributes are included in a class, call Taobao.itemprops.get Fetch.

Property Tool:

Click on the Property tool, the graphical interface to understand more intuitive.

Sales Properties

Sales attributes: The special attributes that make up the SKU, which affect the buyer's purchase and the seller's inventory management, such as the "Color", "package" and "size" of the garment.
When a color is sold in a particular category, the seller publishes the color picture when the baby is released, and the color attribute value directly displays the picture. Otherwise display the property value alias or property value name
Reference:
How to determine what sales attributes are included in a class, call Taobao.itemprops.get Fetch

Property Tool:
Click on the Property tool, the graphical interface to understand more intuitive.

Commodity properties

Commodity attributes: Commodity attributes indicate the unique characteristics of the product, such as the new and old degree, the warranty method, etc., can not be used as a product property.

Non-critical properties

Non-critical properties: Other than key properties, sales properties, note: Non-critical properties in the product also do not include commodity attributes

Sku=stock keeping UINT (inventory unit)
The smallest available unit for holding inventory control, such as a T-shirt, a SKU is usually made of color and size, as shown in the following figure: