XXX>
<CCC>
<DDD>
<BBB/>
<BBB/>
<EEE/>
<FFF/>
DDD>
CCC>
AAA>
4. [1] , last()
/AAA/BBB[1]
<AAA>
<BBB/>
<BBB/>
<BBB/>
</AAA>
/AAA/BBB[last()]
<AAA>
<BBB/>
<BBB/>
<BBB/>
</AAA>
5. "@" :
//@id
伊图教程网[www.etoow.com]
http://www.etoow.com/html/2009-04/1240010435-2.html
<AAA>
ASP.NET 2.0中使用XML时XPath的语法
'http://www.etoow.com/html/2009-04/1240010435-2.html