What are Data Sources ?
Data Sources include all major places where important data is created or used, including
Applications, Databases, Spreadsheets, XML files and so on. 
It also includes Information related to each Stage in the Best Practice Road Map on People, Roles and Responsibilities.
This Information is stored within an Information Catalog.
 A Repository record Data Sources for all major Applications, Databases, Spreadsheets and so on.
 Data and information related to each Stage in the Best Practice Road Map
 This includes details of People, Roles and Responsibilities,  Applications, Databases
Why is this Stage important
 It provides the starting-point for any analysis of data, including Integration, Data Quality, Reports and so on.
How do we get started ?
Step 1. Agree initial content and revise at regular intervals.
Step 2. Identify individuals responsible for data gathering and dissemination.
Step 3. Take a bottom-up Approach and focus on working documents, such as Invoices.