underlying document的意思|示意

Elements of the logical model have properties and relationships reflecting a subset of their characteristics as defined in the underlying document.

逻辑模型的元素具有属性和关系，用于反映其基础文档中定义的特征子集。

Be careful when dealing with HTML collections because they represent the live, underlying document.

小心地处理HTML集合，因为他们表现出“存在性”，总是对底层文档重新查询。

Some designer loaders can detect changes made to their underlying document and determine if a reload of the designer is actually necessary.

部分设计工具载入器可侦测对其基础文件所做的变更，并判断实际上是否需要重新载入设计工具。