http://support.americommerce.com/hc/en-us/articles/204466554
Linked Products
Linked products is a mechanism for sharing fundamental
product data, such as inventory, status, variants, etc between multiple
products. This allows for having distinct SEO related product information such
as descriptions across different stores while still maintaining a single
inventory.
This is accomplished by allowing each product to be used as
a “master” product; if you wish to create a view of that product with distinct
information for a particular storefront, you can take an existing product in
your catalog and create a linked product. Linked products will share
particular information with the master. Information that is not
inherently shared with the master can be overridden on the linked
product. You can then display the linked product in a separate
storefront, complete with the distinct information.
To create a new linked product, you will locate the desired
product to use as the master product in the admin console and edit it. On
the editor, you will have the option to create a new linked product. You
will not be able to link two existing products together. One master
product can have any number of linked products. A master product cannot
be linked to another master product. A linked product cannot be linked to
more than one master product. We will auto generate a SKU when creating a
linked product, it can be changed if desired.
The following fields/information will be inherently shared between
master products and all linked products. They cannot deviate between
master/linked products and thus cannot be different across storefronts.
GTIN
Product
Status
Weight
& Dimensions
Product
Group Configuration
Product
Variants & Variant Inventory Configuration
Attributes
Product
Hide flag
Ships
Individually flag
Non
Shipping Item flag
eProduct
configuration
All
fields on the Inventory tab of the product editor (Non-Inventory, On Hand Qty,
On Order Qty, Min Qty, Max Qty, Starting Qty, Qty Multiple, Low Stock Qty,
Warnings Enabled, Discontinued, ETA date)
The following fields will be distinct between master products and
all linked products and can deviate across storefronts:
SKU
(This MUST be different for each linked product, and you must have a SKU on the
master product and all linked products. Linked products must have a
system-wide unique SKU.)
Descriptions
Custom
URLs (Must be overridden if the master has a custom URL)
Photos
(Photos can be shared with the master but will be overridden if photos are
added to the linked product)
Pricing
(Pricing is unique in that the linked product can have its own pricing but also
inherits its master’s pricing.)
Stores
& Themes
Shipping
flags and configuration not explicitly stated as shared above.
Categories
(A linked product must pick its own categories. It can be the same as the
master but won’t be inherited.)
Personalization
options (Personalization options can be shared with the master but will be
overridden if a personalization is added to the linked product)
All
other product information not explicitly stated as shared above.