You can perform a query of any attribute on the parent or child component of the item and on any field defined in the work package, work node, or process.

可以查询项目的父组件和子组件的任何属性，也可以查询工作包、工作节点或过程中定义的任何字段。

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Also, level keys, default attributes, or related attributes from any parent levels of Li can be added to the query.

另外，来自Li的任何父级的级键、默认属性或相关属性也可以添加到查询中。

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The added bonus, in this case, is that "parent types" are also implicitly "joined" as part of the query. Listing 6 shows the output from my InheritanceTest back in Listing 3.

额外的好处是，“父类型”也是作为查询的一部分隐式地“加入”的。

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