Cloud Computing and SOA Convergence in Your Enterprise: A Step ...

98 Chapter 5 Working from Your Data to the Clouds
Sales
CustNum (char 20)
Date (date)
SaleAmount (num 20)
ProductSold (char 10)
Inventory Management Database
Products
ProductID (char 10)
ProductDesc (char 40)
ProductWeight (num 10)
AmountOnHand (num 10)
General Ledger Database
Customers
CNum (char 30)
CName (char 30)
CAddress (char 40)
CCity (char 30)
CZip (char 5)
Products
PNum (char 30)
PDesc (char 40)
PPrice (num 10)
Sales
CNum (char 30)
PNum (char 30)
SAmount (num 10)
We need to create a data dictionary, if not currently in place, for each system.
Then, we create a domainwide data catalog. Finally, we create the information
model.
The data dictionaries are pretty simple for this problem domain because the
data is well defined in each database. It is just a matter of adding a description and
some other information, including
The reason for the existence of particular data elements
Ownership
Format
Security parameters
The role within both the logical and physical data structures