Hello,
This is a new feature implemented in 740. The green/red flag shows if the data source is released for ODP or not. You could find more information about it in top menu “Utilities” > “Color Key”.
More about ODP: http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/709e0dae-e90d-2f10-6e90-8106dad4a34e?QuickLink=index&…
Note: 1558737 - Data Sources released for ODP data replication API
Br, András