XML - Managing Data Exchange/XPath/Answers

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XPath Exercises => Exercises


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ExercisesEdit

In this exercise, you will modify the xsl-tree.xsl file we saw in chapter 8 XPath to...


  1. Print the name attribute of every bigBranch element with thickness set as ‘thick’.
  2. Print the name of the parent of each bigBranch.
  3. Print the color of all leaves with a color attribute.


AnswersEdit

1. Print the name attribute of every bigBranch element with thickness set as ‘thick’Edit

xsl-tree1.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"/>

	<xsl:template match="/child::trunk">
		<html>
			<head>
				<title>XPath Tree Tests</title>
			</head>
			<body>
				<xsl:for-each select="child::bigBranch[attribute::thickness='thick']">
					<xsl:call-template name="print_out"/>
				</xsl:for-each>
			</body>
		</html>
	</xsl:template>

	<xsl:template name="print_out">
		<xsl:value-of select="attribute::name"/>
		<br/>
	</xsl:template>

</xsl:stylesheet>

Output

bb1


2. Print the name of the parent of each bigBranchEdit

xsl-tree2.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"/>

	<xsl:template match="/child::trunk">
		<html>
			<head>
				<title>XPath Tree Tests</title>
			</head>
			<body>
				<xsl:for-each select="child::bigBranch">
					<xsl:call-template name="print_out"/>
				</xsl:for-each>
			</body>
		</html>
	</xsl:template>

	<xsl:template name="print_out">
		<xsl:value-of select="parent::node()/attribute::name"/>
		<br/>
	</xsl:template>

</xsl:stylesheet>

Output

the_trunk
the_trunk
the_trunk

3. Print the color of all leaves with a color attributeEdit

xsl-tree3.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"/>

	<xsl:template match="/child::trunk">
		<html>
			<head>
				<title>XPath Tree Tests</title>
			</head>
			<body>
				<xsl:for-each select="descendant::leaf[string(attribute::color) != '']">
					<xsl:call-template name="print_out"/>
				</xsl:for-each>
			</body>
		</html>
	</xsl:template>

	<xsl:template name="print_out">
		<xsl:value-of select="attribute::name"/>, <xsl:value-of select="attribute::color"/>
		<br/>
	</xsl:template>

</xsl:stylesheet>

Output

leaf1, brown
leaf5, purple
leaf9, black
leaf14, red
leaf17, red

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