Databases Reference
In-Depth Information
Chapter 5
MDM Maturity Levels and
Model-driven MDM
Three levels are used to evaluate the maturity of an MDM
system: virtual, static and semantic.
The lowest level uses only virtual MDM; the highest level
requires the practice of semantic MDM. Between the two,
static MDM presents certain risks in relation to data quality
because it may create inconsistencies in the data repository.
It is important to have a clear understanding of the
differences between these three levels so as not to create
false expectations from users, as only semantic MDM
interests business users. We will also see that a more
detailed technical analysis of MDM leads to the concept of
Model-driven MDM.
5.1. Virtual MDM
Virtual MDM answers a problem which IT faces when
information is linked across several databases. Take the
example of a product which is associated with a list of
factories. If the information is stored in the same database
