个XM文档 K?xml version=1.0 encoding="IS0-8859-1?> <! DOCTYPE book system http://sidbrc.com/dtds/book.dtd < book year=”1998” <tit1eXM技术内幕√ title Author> <firstname >Natanya</firstname> lastname>Pitts/lastname> K /author> Price> $25</price> </book>一个XML文档 <?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE book system "http://sidbrc.com/DTDS/book.dtd"> <book year =”1998”> <title>XML技术内幕</title> <author> <firstname>Natanya</firstname> <lastname>Pitts</lastname> </author> <price> $25</price> </book>