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Apologies for these seemingly random questions but I have read numerous resources and am still struggling to understand why xsl:sequence is so important.
1. What is meant when the XSLT 2 spec states:
xsl:sequence can return a sequence containing existing nodes, rather than constructing new nodes.
<xsl:sequence select="." /> is constructing new nodes in the output that is, in effect, a copy-of the context node. Is this particular construct not a good example of what the XSLT 2 spec above is referring to?
2. I also understand sequence allows you to construct a sequence of different datatypes in one expression,
What, then, is the point of the concat function in XSLT 2? ie could
<xsl:sequence select="concat(meta/brand/text(), ' | ', genre/text())"/>
be rewritten:
<xsl:sequence select="meta/brand/text(), ' | ', genre/text()"/>
??
3. The XSLT 2 spec provides the following example code:
Does <xsl:sequence select="@price"/> not assign an attribute node to the variable $prices? If so surely this is wasteful?
Thanks in advance
Tom
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[xsl] xsl:sequence
Subject: [xsl] xsl:sequence From: "tom tom" <tomxsllist@xxxxxxxxxxx> Date: Mon, 07 Aug 2006 10:34:08 +0100 |
Apologies for these seemingly random questions but I have read numerous resources and am still struggling to understand why xsl:sequence is so important.
1. What is meant when the XSLT 2 spec states:
xsl:sequence can return a sequence containing existing nodes, rather than constructing new nodes.
<xsl:sequence select="." /> is constructing new nodes in the output that is, in effect, a copy-of the context node. Is this particular construct not a good example of what the XSLT 2 spec above is referring to?
2. I also understand sequence allows you to construct a sequence of different datatypes in one expression,
What, then, is the point of the concat function in XSLT 2? ie could
<xsl:sequence select="concat(meta/brand/text(), ' | ', genre/text())"/>
be rewritten:
<xsl:sequence select="meta/brand/text(), ' | ', genre/text()"/>
??
3. The XSLT 2 spec provides the following example code:
<xsl:variable name="prices" as="xs:decimal*"> <xsl:for-each select="//product"> <xsl:choose> <xsl:when test="@price"> <xsl:sequence select="@price"/> </xsl:when> <xsl:otherwise> <xsl:sequence select="@cost * 1.5"/> </xsl:otherwise> </xsl:choose> </xsl:for-each> </xsl:variable> <xsl:value-of select="avg($prices)"/>
Does <xsl:sequence select="@price"/> not assign an attribute node to the variable $prices? If so surely this is wasteful?
Thanks in advance
Tom
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