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

Products
Taobao standardized products, determined by the category + key attributes only. such as: Mobile phone category, the key attributes are the brand and model, Nokia N95 is a product, Nokia is the brand, N95 is the model.

Products In addition to the key attributes include sales attributes and non-critical attributes.

Reference:

such as "Nokia N95" is a product. A unique product is determined by a combination of key attributes for the class purpose.

Background standard category leaf node, a group of common characteristics of the product combination (for example: Cosmetics + Avon + Moisturizing Products + capacity), products belonging to the same product can be considered to the consumer's effectiveness and the use of feelings are no different.

Commodity
That's what Taobao says, a combination of instantiated objects for SPU, sales attribute (+sku)

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

Sku

Key attributes

Key attributes: The ability to confirm the properties of a unique product, which can be a combination of one or more key attributes.

Reference:

For example, the "brand" and "model" of the mobile phone can determine the only product, and the "brand" and "article number" of the garment can determine the only product.

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

Properties Tool:

Please click on the Properties tool and the graphical interface is more intuitive to understand.

Sales attributes

Sales attributes: A special attribute that makes up the SKU, which affects the buyer's purchase and the seller's inventory management, such as the "Color", "package", and "size" of the garment.
When the color is sold in a specific class, when the seller publishes the color picture when the baby is released, the color attribute value displays the picture directly. Otherwise display property value aliases or property value names
Reference:
How to determine which sales attributes are included in a class, call Taobao.itemprops.get get

Properties Tool:
Please click on the Properties tool and the graphical interface is more intuitive to understand.

Commodity properties

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

Non-critical properties

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

Sku=stock keeping uint (in stock units)
To save the smallest available unit of inventory control, such as one SKU in a T-shirt usually consists of color, size, as shown below: