This is also the case in most document management or file systems-documents and files are organized into directories and subdirectories that must be created first in order to be used.
多数文档管理或文件系统也采用这种方法——必须先创建目录和子目录，然后将文档和文件组织到其中。
Support for a variety of data sources, including relational database management systems (DBMSs), non-relational DBMSs, files, XML documents, and others.
支持各种数据源，其中包括关系数据库管理系统(DBMS)、非关系DBMS、文件、XML文档和其他数据源。
Instance metadata simply is data stored in a content management metadata repository and refers to objects stored somewhere else, such as documents, Web pages, audio, and video files.
实例元数据只是储存在内容管理元数据储存库中的数据，并引用存储在别处的对象，例如文档、web页面、音频和视频文件。
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