Relationships are options and setup between the active
product, customers, and other products and or reports. For products via the
web, functionality to define each product with keywords and categories is also
available. Relationships include the following:

Related Products – Products that are related
to either other by various ways. This can include cross selling,
prerequisites, required, substitute, or up-sell etc.
Related Customers – Products can be related to
constituents such as authors, vendors, publishers etc.
Related Files – Some products come with
documentation or other files such as guides, rebates, or instructions.
Related Categories & Keywords – Specified
category words used for the eBusiness module.