Problem:Counting specific type of nodes lying in betwe

Hi,

I am having trouble constructing the XPath for this
one. Can anyone help me with this?

Thanks
Sanjukta

I am trying to accomplish the following 2 steps


Step1:(this is working)
The current node is a ptr here.I am trying to traverse
back and find the first question whose parent is an
yes answer.

<xsl:param name="stop_question"
select="./ancestor::decisiontree_question[parent::decisiontree_answer[@answer='yes']][1]"/>

Eg : If my current node is ptr6, stop_question should
give me Q1a( please refer to the source structure
below)

Step2: (this is not working)
Defining the param Cnt that counts the number of
  No answers in between the current node(ptr) and
stop_question.
  If the current node is ptr6 this should return 4
Heres the piece of code that is not working:

<xsl:param name="Cnt"
select="count(ancestor::decisiontree_answer[@answer='no'][ancestor::decisiontree_question[.=$stop_question]>
0])"/>

Here is a sample structure of the source:

<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet
href="file://localhost/C:/src/css/decisiontree_xml.css"
type="text/css"?>
<!DOCTYPE decisiontree SYSTEM
"file://localhost/C:/src/dtd/decisiontree.dtd">
<decisiontree>
  <decisiontree_question short_question="Q1">
    <instruction/>
    <decisiontree_answer answer="yes">
      <decisiontree_question short_question="Q1A">
        <instruction/>
        <decisiontree_answer answer="no">
          <decisiontree_question short_question="Q1B">
            <instruction/>
            <decisiontree_answer answer="no">
              <decisiontree_question
short_question="Q1C">
                <instruction/>
                <decisiontree_answer answer="no">
                  <decisiontree_question
short_question="Q1D">
                    <instruction/>
                    <decisiontree_answer answer="no">
                     <enumerated_type_ptr ptr="ptr6"/>
                    </decisiontree_answer>
                    <decisiontree_answer answer="yes">
                     <enumerated_type_ptr ptr="ptr4"/>
                    </decisiontree_answer>
                  </decisiontree_question>
                </decisiontree_answer>
                <decisiontree_answer answer="yes">
                  <enumerated_type_ptr ptr="ptr3"/>
                </decisiontree_answer>
              </decisiontree_question>
            </decisiontree_answer>
            <decisiontree_answer answer="yes">
              <enumerated_type_ptr ptr="ptr2"/>
            </decisiontree_answer>
          </decisiontree_question>
        </decisiontree_answer>
        <decisiontree_answer answer="yes">
          <enumerated_type_ptr ptr="ptr1"/>
        </decisiontree_answer>
      </decisiontree_question>
    </decisiontree_answer>
    <decisiontree_answer answer="no">
      <enumerated_type_ptr ptr="ptr5"/>
    </decisiontree_answer>
  </decisiontree_question>
</decisiontree>






		
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