Information services contain the data logic of your business design. Information services provide access to the persistent data of your business.

 

For example: query statements for retrieving the information you care about or referential integrity checks on the information manipulated by these services.

 

These data services are available to the business application as services. Information services at this level incorporates the idea of federating multiple data sources – projecting logical views over those multiple sources to render a simpler access pattern for the service composition that needs it. This is intended to handle two important requirements within the information management space – data composition, and data flow.

 

IBM offering for this layer : Websphere Information server

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