The depth within the product hierarchy where a defined concept is used to group the products.
The product hierarchy is made up of levels of concepts to group products together allowing users to narrow their search. Each level holds multiple nodes of the organization's product data. The nodes within a level should group products based on similarities. Levels are typically numbered 1 through n. As the level numbers rise, the concepts should become more granular. When the levels lower and are closer to level 1, they should become more broad a capture a wider swath of products. Often the level is represented with an "L" followed by the number of the level, i.e. L2.
Hierarchy; L1, L2, L3, Ln, N-1
Application Programming Interface