摘要： Declaring Elements in DTDAn element declaration is used in DTD to describe what content, child element(s), and attribute(s), that element can contain. One element declaration is used for each element ... 阅读全文

摘要： XPath ExpressionsFollowing are some of the expressions that you can use to select one or more nodes from the XML document above:/userinfo - Selects the root element. /userinfo/username - Selects the u... 阅读全文