数字水印是嵌入宿主数据中、具有隐蔽性且不容易去除的数字信息。

A digital watermark is the information that is imperceptibly and robustly embedded in the host data such that it cannot be removed.

youdao

尽管它很简单而且支持任何物理设备存储类型，但是不可能实现跨系统数据迁移/复制和跨组织宿主实例同步。

Even though it is simple and it supports any physical device storage type, data migration/replication across systems and host instances synchronization across organization is not possible.

youdao

基本上就是内嵌在宿主格式(如xhtml或CSS)中的XML数据岛。

These are basically little islands of XML data that are embedded within host formats such as XHTML or RSS.

youdao