What Products and Categories will I see when creating or editing an article using sub products / sub categories?

Environment:

Product and Category listing
Oracle B2C Service Knowledge Advanced

Issue:

There is more than one scenario the availability of sub products / sub categories might be in question:

I am unable to see all Products under Product Selection when I create or edit an article in Knowledge Advanced Authoring.

or

When I add a product or category item that contains sub products/sub categories, I do not see all children of those selections listed in the 'Selected' list.

Resolution:

For Knowledge Advanced Authoring, the list of products available in 'Selected Products' is based on the Products associated with the Content Type of the article.  A Product can contain intermediate and end/leaf nodes from the product trees. Each top-level or intermediate node listed causes all sub-products of that node (all levels) to be included in the configuration, even when the actual sub-products are not listed.  When a product is selected at any level, then the other products at that level must be explicitly selected. For example, Product A has sub products L, M, and N.  If  Product A is selected then all sub products L, M and N are available.  If product A and sub product L are selected, then M and N are not available.

The same behavior applies to categories for Knowledge Advanced.