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FluentMetadata is a project to provide Metadata and Validation to Entities and ViewModels.
One Goal of this implementaion is to Don’t Repeat Yourself. So you can define the Metadata (in a fluent way) on one place an use it on several other places like:

• ASP.NET MVC 2 and 3 Preview 1
• Entity Framework 4 CodeFirst with EF Feature CTP 4
• NHibernate with FluentNHibernate
• More to Come (WPF etc.)

Also the Metadata can easily copied to ViewModels for ASP.NET MVC 2 Application. So that you don’t to repeat the Metadata for the ViewModels.

Rule Based Model-Validation is also part of FluentMetadata, so that the Rule for Entities must only declared on one Place.

Examples