I omitted all of the x - based things , including gnome and kde , and installed everything else 实际上，所有的系统标识符都是uri ，从来没有一种结构同时包含uri和系统标识符。
The section in blue is called the public identifier , the green part is the system identifier , which is a uri 蓝色的部分是公有标识符；绿色的部分是系统标识符，它是个uri 。
Can be used to specify the location from which an xml processor loads a dtd , given the system and public identifiers for that dtd 标识符解析成实际的文档。比如，给定一个dtd的系统标识符和公共标识符，
Oh , and downloads are free . the obvious concern is that the 2 gb disk the machine came with is probably a little small 通过维护一个标准url和系统标识符列表并将其映射到特定位置的副本， xml编目可以解决这个问题。
Many data sources also have existing identifiers that fulfill the api s requirements on data source identifiers , such as document management system identifiers , that implementations could use instead of hash values 很多数据源也具有现有的标识符来实现api对数据源标识符的需求，比如文档管理系统标识符，实现可以使用它来代替散列值。
