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[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Traversing the tree
 > That's a fairly non-trivial proposition, actually. Bummer, I thought there would be some (perhaps complex) Xpath expression I could use. Actually the last 0 for A10 isn't a typo. Basically any new <a> node should restart the counter. But I'll work with what you provided and see if I can solve that. Thanks once again! Anupam. --- JBryant@xxxxxxxxx wrote: > That's a fairly non-trivial proposition, actually. > > Here's one solution. The algorithm is to gather up all the reg nodes into > a variable (to remove any other structure) and then walk through the list > of nodes in the variable. To do the walking, I wrote a recursive template > that figures out what the values for the current reg node should be and, > if a subsequent reg node exists, calls itself again. > > Here's the 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" indent="yes"/> > > <xsl:variable name="reg"> > <xsl:for-each select="//reg"> > <xsl:copy-of select="."/> > </xsl:for-each> > </xsl:variable> > > <xsl:template match="top"> > <html> > <body> > <table> > <tr> > <th>reg ID</th><th>Offset Value</th> > </tr> > <xsl:call-template name="figure-offset"> > <xsl:with-param name="offset" select="0"/> > <xsl:with-param name="position" select="1"/> > </xsl:call-template> > </table> > </body> > </html> > </xsl:template> > > <xsl:template name="figure-offset"> > <xsl:param name="offset"/> > <xsl:param name="position"/> > <xsl:choose> > <xsl:when test="$reg//reg[position() = $position]/@offset"> > <tr> > <td><xsl:value-of select="$reg//reg[position() = > $position]"/></td> > <td><xsl:value-of select="$reg//reg[position() = > $position]/@offset"/></td> > </tr> > <xsl:if test="$reg//reg[position() = $position]/following::reg"> > <xsl:call-template name="figure-offset"> > <xsl:with-param name="offset" select="$reg//reg[position() = > $position]/@offset + 1"/> > <xsl:with-param name="position" select="$position + 1"/> > </xsl:call-template> > </xsl:if> > </xsl:when> > <xsl:otherwise> > <tr> > <td><xsl:value-of select="$reg//reg[position() = > $position]"/></td> > <td><xsl:value-of select="$offset"/></td> > </tr> > <xsl:if test="$reg//reg[position() = $position]/following::reg"> > <xsl:call-template name="figure-offset"> > <xsl:with-param name="offset" select="$offset + 1"/> > <xsl:with-param name="position" select="$position + 1"/> > </xsl:call-template> > </xsl:if> > </xsl:otherwise> > </xsl:choose> > </xsl:template> > > </xsl:stylesheet> > > And here's the output (from Saxon): > > <html> > <body> > <table> > <tr> > <th>reg ID</th> > <th>Offset Value</th> > </tr> > <tr> > <td>A1</td> > <td>0</td> > </tr> > <tr> > <td>A2</td> > <td>1</td> > </tr> > <tr> > <td>A3</td> > <td>10</td> > </tr> > <tr> > <td>A4</td> > <td>11</td> > </tr> > <tr> > <td>A5</td> > <td>12</td> > </tr> > <tr> > <td>A6</td> > <td>24</td> > </tr> > <tr> > <td>A7</td> > <td>25</td> > </tr> > <tr> > <td>A8</td> > <td>6</td> > </tr> > <tr> > <td>A9</td> > <td>7</td> > </tr> > <tr> > <td>A10</td> > <td>8</td> > </tr> > </table> > </body> > </html> > > You specified a value of 0 for the last offset, but I am assuming that's a > typo. > > As usual, I'm sure there are other ways. > > Jay Bryant > Bryant Communication Services > (presently consulting at Synergistic Solution Technologies) > > > > > > "Agnisys Technology \(P\) Ltd." <agnisys@xxxxxxxxx> > 09/08/2005 04:09 PM > Please respond to > xsl-list@xxxxxxxxxxxxxxxxxxxxxx > > > To > xsl-list@xxxxxxxxxxxxxxxxxxxxxx > cc > > Subject > Traversing the tree > > > > > > > Hi, > This is probably simple for the experts of the group but I can't figure > this out. Problem I got > stuck on was how to find the closest preceding-sibling node with an offset > attribute, then count > the nodes that don't have the attribute since that node. > > Input : > <top> > <a> > <reg > A1 </reg> > <reg > A2 </reg> > <reg offset="10" > A3 </reg> > <reg > A4 </reg> > <reg > A5 </reg> > <reg offset="24" > A6 </reg> > <reg > A7 </reg> > </a> > <a> > <reg offset="6"> A8 </reg> > <reg > A9 </reg> > </a> > <a> > <reg > A10 </reg> > </a> > </top> > > Output: > A1 : 0 > A2 : 1 > A3 : 10 > A4 : 11 > A5 : 12 > A6 : 24 > A7 : 25 > A8 : 6 > A9 : 7 > A10: 0 > > So, start with 0 and count unless @offset is encountered, if so, jump to > the offset and start > === message truncated === ______________________________________________________ Click here to donate to the Hurricane Katrina relief effort. http://store.yahoo.com/redcross-donate3/ 
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