Chapter 4 Metadata in DW 2.0
One of the essential ingredients of the DW 2.0 architecture is metadata. Unlike first-generation data warehouses where metadata either was not present or was an afterthought, metadata is one of the cornerstones of the DW 2.0 data warehouse.
There are many reasons metadata is so important. Metadata is important to the developer, who must align his/her efforts with work that has been done previously. It is important to the maintenance technician, who must deal with day-to-day issues of keeping the data warehouse in order. It is perhaps most important to the end user, who needs to find out what the possibilities are for new analysis.
The best way to understand the value of metadata in DW 2.0 is to see it as acting like ...