A Document has attributes such as title, author, and description.
文档具有标题、作者和描述之类的属性。
The first thing to note is the group of parameters such as title and creator.
首先要注意的一件事就是参数组（例如，title和 creator）。
Different searches, such as by author, title, or keyword, can also be created.
不同的搜索，如通过作者姓名、题名或者关键词搜索都可以被创建。
Info for information such as the title, publication name, and date of publication.
info用于标题、出版物名称和出版日期等信息。
Info for information such as the title, publication name, and date of publication.
info用于标题、出版物名称和出版日期等信息。
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