Recall that the query model is a client-side library that generates MDX, so it is easy to change the query model without changing the core parts of the API for querying metadata and executing queries.

前面已经说过，查询模型是一个生成MDX的客户端库，所以修改起来非常容易，也不会修改API里查询元数据、执行查询的核心部分。

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The first plug-in packages two assets -- the profile introduced in the previous section and a data type library -- and is a model of core types commonly used in Objective-C programming.

第一个插件打包了两个资产——前面章节中提到的概要文件和一个数据类型库——它是一个核心类型的模型，经常在Objective-C编程中被用到。

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