Data federation addresses the problem of integrating data from heterogeneous source models and includes concepts to map those different source models into the common model at the federated layer.

数据联合处理有关集成来自异类源模型的数据的问题，包括将这些不同的源模型映射到联合层的公共模型的概念。

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Each system has its own proprietary semantic meaning, but is mapped to a logical data model which can be instantiated as a physical federated model or a canonical message model.

每个系统都有其专有的语义，但是被映射到一个逻辑数据模型，可以将此模型实例化为一个物理联合模型或规范消息模型。

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First, you need to get an overview of everything we defined as mapping from any of our data sources to the federated model.

首先，你需要有一个数据源到联邦模型的整体视图。

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The master model will likely be much more like a master data management system or a complex of federated queries that extract data that then may be used in a data mart for special purposes.

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