XML中SystemID和PublicID的区别

http://hi.baidu.com/binboot007/item/1533f91d52113d7c7b5f259c

http://supportweb.cs.bham.ac.uk/documentation/tutorials/docsystem/build/tutorials/docbooksys/segmentedhtml/ch08s02.html

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原文地址：https://www.cnblogs.com/diyunpeng/p/3635355.html