如何获取元素的位置

Question

如何获取当前Para的位置？

<xsl:template match="Para"> 
    <xsl:variable name="PositionInDocument" select="What do I do here?" /> 
</xsl:template> 

这是XML文档：

<QuestionStem>Question </QuestionStem> 
<Para>This is my paragraph question.</Para> 
<Para>Thisis another para for question.</Para> 
<AnswerListItem>Answer</AnswerListItem> 
<Para>This is my answer paragraph</Para> 
<Para>This is another answer paragraph</Para> 
<SubAnswerBulleted>Sub Answer Bulleted</SubAnswerBulleted> 
<Para>This is a paragraph that is part of a sub answer.</Para> 
<SubSubAnswerNumbered>Sub Sub Answer Numbered</SubSubAnswerNumbered> 
<Para>This is a paragraph that is part of a sub sub answer.</Para> 
<SubSubAnswerNumbered>Sub Sub Answer</SubSubAnswerNumbered> 
<SubSubAnswerNumbered>Sub Sub Answer</SubSubAnswerNumbered> 
<SubAnswerBulleted>Sub Answer Bulleted</SubAnswerBulleted> 
<SubAnswerBulleted>Sub Answer</SubAnswerBulleted> 

Answer 1

位置（）

见this