The Classification Attribute Link Type is pre-configured and allows a specification attribute to be available when the product is linked into the specified classification hierarchy via a Product to Classification Link Type.
For example, consider the attribute 'Marked Down %' that is only needed for clearance items. Using two classifications, one for general items and another for clearance items, allows you to display the clearance attribute only on the group of products where it is required.
With additional setup, the Classification Attribute Link Type can also include dimension dependency and metadata attributes as described below.
Dimension Dependency
Dimension dependencies are not recommended for classification attribute link types.
Metadata Attributes
Metadata (description) attributes enable you to control when the linked attribute is published based on an additional setting or provide additional data for any other purpose.
For example, a description attribute named 'Show on Web' has been added to the Classification Attribute Link Type. This description attribute holds the value 'yes' or 'no' and indicates if the specification attribute 'BuyItNowText' should be displayed on the web.
For more information, refer to Description Attributes here.