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Re: XSLT: decorating a grammatical tree

Subject: Re: XSLT: decorating a grammatical tree
From: David Carlisle <davidc@xxxxxxxxx>
Date: Wed, 10 May 2000 16:56:10 +0100 (BST)
grammatical tree
	<exp>
	  <add-exp>
	    <add-exp>
	      <mult-exp>
	        <primary-exp>
	          <literal value="2"/>
	        </primary-exp>
	      </mult-exp>
	    </add-exp>
	    <op-add/>
	    <mult-exp>
	      <primary-exp>
	        <literal value="3"/>
	      </primary-exp>
	    </mult-exp>
	  </add-exp>
	</exp>




<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                version="1.0"
                >

<xsl:output method="xml" indent="yes"/>


<xsl:template match="add-exp[op-add]" mode="value">
<xsl:variable name="x">
<xsl:apply-templates select="*[1]" mode="value"/>
</xsl:variable>
<xsl:variable name="y">
<xsl:apply-templates select="*[3]" mode="value"/>
</xsl:variable>
<xsl:value-of select="$x + $y"/>
</xsl:template>

<xsl:template match="add-exp[op-sub]" mode="value">
<xsl:variable name="x">
<xsl:apply-templates select="*[1]" mode="value"/>
</xsl:variable>
<xsl:variable name="y">
<xsl:apply-templates select="*[3]" mode="value"/>
</xsl:variable>
<xsl:value-of select="$x - $y"/>
</xsl:template>


<xsl:template match="primary-exp[op-mult]" mode="value">
<xsl:variable name="x">
<xsl:apply-templates select="*[1]" mode="value"/>
</xsl:variable>
<xsl:variable name="y">
<xsl:apply-templates select="*[3]" mode="value"/>
</xsl:variable>
<xsl:value-of select="$x * $y"/>
</xsl:template>


<xsl:template match="literal" mode="value">
<xsl:value-of select="number(@value)"/>
</xsl:template>

<xsl:template match="*" mode="value">
<xsl:apply-templates select="*" mode="value"/>
</xsl:template>

<xsl:template match="*">
<xsl:copy>
<xsl:attribute name="value">
<xsl:apply-templates select="." mode="value"/>
</xsl:attribute>
<xsl:apply-templates/>
</xsl:copy>
</xsl:template>

<xsl:template match="op-add|op-sub|op-mult">
<xsl:copy>
<xsl:apply-templates/>
</xsl:copy>
</xsl:template>


</xsl:stylesheet>


bash-2.01$ xt exp.xml exp.xsl
<?xml version="1.0" encoding="utf-8"?>
<exp value="5">
          <add-exp value="5">
            <add-exp value="2">
              <mult-exp value="2">
                <primary-exp value="2">
                  <literal value="2"/>
                </primary-exp>
              </mult-exp>
            </add-exp>
            <op-add/>
            <mult-exp value="3">
              <primary-exp value="3">
                <literal value="3"/>
              </primary-exp>
            </mult-exp>
          </add-exp>
        </exp>
bash-2.01$ 


 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list


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