NOMAD is the most functionally rich business intelligence reporting tool available today for delivering a full range of applications with easy access to a variety of data sources for reporting and analysis. NOMAD is a fully relational product, which provides the basis for its tight integration with and highly efficient use of other relational database engines such as DB2 for z/OS and DB2 for z/VM.
The NOMAD database, which is both relational and hierarchical, has been used by our customers for years to provide an efficient repository of their data. Even though relational is the more common approach for a database today, a hierarchical approach may be more efficient for data storage and for reporting access based on the organization of your data. See the link directly below for complete list of the strengths and benefits of the NOMAD database