在XSL中定义HTML标签里的属性使用XSL的值

如何在XSL中定义HTML标签里的属性使用XSL的值??

 

[xml]

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="exam.xsl"?>
<test> 
  <test_type>exam</test_type>
  <testid id="1">
   <say>什么事情啊?</say>
   <answers>
   <answer id="00001">我知道了</answer>
   <answer id="00002">我明白了</answer>
   <answer id="00003">是的</answer>
   <answer id="00004">好</answer>
   </answers>
  </testid>
  <testid id="2">
   <say>什么事情啊?2</say>
   <answers>
   <answer id="00001">我知道了2</answer>
   <answer id="00002">我明白了2</answer>
   <answer id="00003">是的2</answer>
   <answer id="00004">好2</answer>
   </answers>
  </testid>
  <testid id="3">
   <say>什么事情啊?3</say>
   <answers>
   <answer id="00001">我知道了3</answer>
   <answer id="00002">我明白了3</answer>
   <answer id="00003">是的3</answer>
   <answer id="00004">好3</answer>
   </answers>
  </testid> 
</test> 

[exam.xsl]

<?xml version='1.0' encoding='utf-8' ?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" >
 <xsl:output method="html"/>

 <xsl:template match="/"><form action="test.aspx" method="post">
    <p><xsl:apply-templates select="test"/></p>
    <p>
       <input type="submit" value="Submit"/>
       <input type="reset" value="Reset"/>
    </p> 
  </form>
 </xsl:template>


 <xsl:template match="test">
  <xsl:for-each select="testid">
     <p>题目: </p>
     <xsl:value-of select="say"/>
     <xsl:for-each select="answers">    
        <xsl:for-each select="answer">
        <p>
            <input type="radio" CHECKED="0" value="text()" name="ancestor::testid/@id" >
            <xsl:value-of select=" text()"/>
            </input>
        </p>
      </xsl:for-each>                 
      </xsl:for-each>
  </xsl:for-each>
 </xsl:template>
</xsl:stylesheet>

语法:

name="{ancestor::testid/@id}"