Preceding descriptors are illustrated by flowchart items that represent tables of information. Each table of information can be thought of as a block of data.

前述描述符以流程图项目形式展示，这些项目代表了信息的表格。每个信息表格可被视为一个数据块。

Instead of a block of data, Report descriptors are composed of pieces of information. Each piece of information is called an Item.

而报告描述符并非由数据块构成，而是由信息片段组成。每一个信息片段称为一个“项”。