Subject: Re: Traversing the tree
From: "Agnisys Technology \(P\) Ltd." <agnisys@xxxxxxxxx>
Date: Thu, 8 Sep 2005 16:24:21 -0700 (PDT)
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> 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 ===
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