Is there better explaination of the WCF RIA Services Library Project structure?

When you create WCF RIA Services Library Project then two projects appears.

1. RIAServicesLibrary1
2. RIAServicesLibrary1.Web

It's clear for me what for we need RIAServicesLibrary1.Web project to kee开发者_StackOverflowp stuff like LinqToEntitiesDomainService?

But my questions is: how we can use RIAServicesLibrary project? Is any real sense of it usage?

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The RIAServicesLibrary can be used for directly referencing in client applications that do not need to have to be deployed in a multi-tier environment (client-server). As soon as you want to have your client talk to a webservice on a central server you will communicate to the .Web variant, which has a direct reference to the library project.