Re: Understanding Identity Transformations

Is the nature of identifty transformations recursive?  How does the
engine know that eventually the recursive call is going to run out?

I have a large document, I am interested in transforming it.  I want
to reproduce the xml source but restricted for a specific value match.
 I totally understand how to write the appropriate select in an
apply-template rule to get the desired results, but do not understand
how to mix this call up with the recursive template identity
tranformation.
So, starting with SAMPLE_002, where would I stub out and add the
qualifying select?  What confuses me, is that in the sample we are
saying (basically) grab everything from the top to the bottom and at
every level.  I'm affraid that my select on an element who's value is
'1234' is going to mess up the results.  I hope this makes sense and I
understand the concept of changing a single element, or single
attribute by setting up the match, but in this case, I need the parent
node, and all of the child nodes.

XML:
<root>
	<part1>
		<!--I will be copied-->
		<node copy="yes">So do <b>I</b>.</node>
	</part1>
	<part2>
		<node copy="no">I <b>don't</b> feel like being copied today</node>
		<data>
			<value>1</value>
			<value>2</value>
			<value>3</value>
		</data>
	</part2>
</root>

OUTPUT:
<result>
	<part1>		<!--I will be copied-->

		<node copy="yes">So do <bold>I</bold>.</node>
	</part1>
	<p>I don't feel like being copied today</p>
	<p>Sum= 6</p>
</result>

<xsl:template match="root">
	<result>
		<xsl:apply-templates select="part1" mode="IdTr"/>
		<xsl:apply-templates select="part2"/>
	</result>
</xsl:template>

<xsl:template match="node">
	<p><xsl:apply-templates/></p>
</xsl:template>

<xsl:template match="data">
	<p>Sum= <xsl:value-of select="sum(value)"/></p>
</xsl:template>

<xsl:template match="@* | node()" mode="IdTr">
   <xsl:copy>
     <xsl:apply-templates select="@* | node()" mode="IdTr"/>
   </xsl:copy>
</xsl:template>

<xsl:template match="b" mode="IdTr">
	<bold><xsl:apply-templates/></bold>
</xsl:template>

regards,
--
Joris Gillis (http://www.ticalc.org/cgi-bin/acct-view.cgi?userid=38041)
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