Re: [xsl] Seeking XPATH

[David Carlisle <davidc at nag dot co dot uk>]

   Hi All,

   Thanks Derek, Mike, and Jeri for the replies.

   So....given the aforementioned xml dom ( see below ) and assuming ROOT is
   the current context node, then

   A[B[@NM = "case1"]/text() = A[B[@NM = "case3"]/text()]]
   ^^^^^^^^^^^^^^^^^^^^^^^^^   ^^^^^^^^^^^^^^^^^^^^^^^^^^^

   should find the A nodes with IDs 'match1' and 'match2' ? (the IDs are just
   for conversational clarity).

   If so, please be so kind as to clarify, because I cannot get this to work.


The Xpath expression you show doesn't find any nodes, it is a boolean
expression, it just returns true or false.

 A[B[@NM = "case1"]/text()

returns a node set of all the text nodes of the selected A node.
there are three nodes in that set with values
{ "
     " , "
     " , "
      ---
   " }

The right hand side similarly is  a node set of three nodes (which 
have the same values, as far as I can see)

= applied to node sets is true if there exists a node in each set with
equal values. This is true in this case.


   <ROOT>

   <A ID="match1">
     <B NM="case1">abc</B>
     <B NM="case2">xyz</B>
      ---
   </A>

   <A ID="match2">
     <B NM="case3">abc</B>
     <B NM="case4">def</B>
      ----
   </A>

   <A>
     <B NM="case5">lmn</B>
     <B NM="case6">qrs</B>
      ----
   </A>

   </ROOT>




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