主题词是揭示文件基本内容,并通过规范化处理的名词术语。其作用是与文件标题相配合,进一步简易而精确地揭示文件内容所涉及的事件、概念等对象的性质状态,为准确、快捷提供检索标识,为计算机等智能化设备处理和管理文件奠定基础。可见,主题词具有特定性、系统性和规范性的特点。 Thesaurus is to reveal the basic content of the document, and through standardized terminology. Its role is to cooperate with the title of the document to further reveal the nature and state of the objects, such as the events and concepts involved in the content of the document, in a simple and accurate manner, and provide the search logo accurately and quickly, which lays the foundation for processing and managing documents by intelligent devices such as computers. Visible, the keyword has particularity, systematic and normative characteristic.