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Hello Worldin XSLT
Because XML can be used to represent any vocabulary (often defined by some schema), the question is how these different vocabularies can be processed and maybe transformed into something else. This something else
may be another XML vocabulary (a common requirement in B2B scenarios), or it may be HTML (a common scenario for Web publishing). Using XSL Transformations (XSLT), mapping tasks can be implemented easily. XSLT leverages XPath's expressive power in a rather simple programming language, the programs are often called stylesheets. For easy tasks, XSLT mappings can be specified without much real programming
going on, by simply specifying how components of the source markup are mapped to components of the target markup.
<xsl:for-each select=".//a">
<xsl:if test="not(@title)">
<xsl:text>This link has no title!</xsl:text>
</xsl:if>
</xsl:for-each>
<xsl:for-each select=".//a[not(@title)]">
<xsl:text>This link has no title!</xsl:text>
</xsl:for-each>
default behaviormay seem strange
<?xml version="1.0" encoding="UTF-8"?> <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> </xsl:stylesheet>
textof the document is produced
<?xml version="1.0" encoding="UTF-8"?> <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:output method="text"/> <xsl:template match="/ | *"> <xsl:text>( Element: </xsl:text> <xsl:value-of select="local-name()"/> <xsl:apply-templates select="@* | *"/> <xsl:text>)</xsl:text> </xsl:template> <xsl:template match="@*"> <xsl:text>Attribute: </xsl:text> <xsl:value-of select="local-name()"/> </xsl:template> </xsl:stylesheet>
appliedby the XSLT processor
<xsl:output method="html"/>
<xsl:template match="/">
<html>
<head>
<title>Address List</title>
</head>
<body>
<table>
<xsl:for-each select="/people/entry">
<tr>
<td><xsl:value-of select="name/given[1]"/></td>
<td><xsl:value-of select="name/sur"/></td>
<td><a href="mailto:{email}"><xsl:value-of select="email"/></a></td>
</tr>
</xsl:for-each>
</table>
</body>
</html>
</xsl:template>spaghetti code
Hello Worldin XSLT
hello worldtherefore ignores the input
<?xml version="1.0" encoding="UTF-8"?> <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:template match="/"> <xsl:text>Hello World!</xsl:text> </xsl:template> </xsl:stylesheet>
<xsl:for-each select="/people/entry">
<tr>
<td><xsl:value-of select="name/given[1]"/></td>
<td><xsl:value-of select="name/sur"/></td>
<td><a href="mailto:{email}"><xsl:value-of select="email"/></a></td>
</tr>
</xsl:for-each> <table>
<xsl:for-each select="/people/entry">
<tr>
<td><xsl:value-of select="name/given[1]"/></td>
<td><xsl:value-of select="name/sur"/></td>
<td>
<xsl:if test="email">
<a href="mailto:{email}"><xsl:value-of select="email"/></a>
</xsl:if>
</td>
</tr>
</xsl:for-each>
</table> <td>
<xsl:for-each select="phone">
<xsl:text>☎ (</xsl:text>
<xsl:choose>
<xsl:when test="@location = 'office'">Office</xsl:when>
<xsl:when test="@location = 'home'">Home</xsl:when>
</xsl:choose>
<xsl:text> </xsl:text>
<xsl:choose>
<xsl:when test="@type = 'voice'">phone</xsl:when>
<xsl:when test="@type = 'fax'">fax</xsl:when>
</xsl:choose>
<xsl:text>): </xsl:text>
<xsl:value-of select="."/>
<xsl:if test="position() ne last()">
<br/>
</xsl:if>
</xsl:for-each>
</td>