10.4 The Central Metadata Repository As we can see, there is a need for accurate and reliable metadata throughout the entire organization. This need extends from the data warehouse architect all the way to the business strategist. Figure 10.4 shows the different groups that require metadata. Each group shown in this diagram has its own unique metadata needs. At first glance, one might not consider end users to be interested in metadata. When we consider our definition of metadatathat it provides the context for the datawe see that users are the ultimate consumers of metadata. Metadata, especially in a BI environment, is critical to the end users. When the user is looking at a particular data element, the metadata provides the meaning. The reverse is true as well: When the user knows what data he or she wants, the metadata tells the user where to find it. Figure 10.4. Metadata users.
As seen in Figure 10.4, the end user is different from the other users of metadata. The end user consumes metadata but does not have direct input into the metadata repository. The data warehouse architect, system engineers , and administrators all provide input into the repository. The following lists some of the interactions with the metadata repository:
The central metadata repository is critical to the success of not only the data warehouse but of the entire organization. As such, the scope of the repository should extend to the entire enterprise. This enterprise-level view is contained within the Enterprise Data Model (EDM). While the EDM is not strictly part of the data warehouse project, we will address it due to its effects on the warehouse. |
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