Hierarchical systems allow you to address a primary key as an element or attribute, as well, but they also let you create indexes at different levels based on data within the hierarchy.

Protocol Published: 16 June 2016 Visualization and cellular hierarchy inference of single-cell data using SPADE Benedict Anchang, Tom D P Hart, Sean C Bendall, Peng Qiu, Zach Bjornson, Michael ...

Customer hierarchy data, including numeric keys that show how different sites, affiliates, and subsidiaries tie together for an end-to-end view of the customer and the customer's interactions with ...