Table of content#

• Review Week3 Tutorial.
• Introduce XSLT
• Look at how XSLT is processed
• Look at some common XSLT elements.
  • Templates.
  • Functions.
  • Expressions.

XML TRANSFORMS#

• XSL (eXtensible Stylesheet Language) is a styling language for XML.
• XSLT stands for XSL Transformations.
• XSL / XSLT allows us to convert one XML structured document into another (data formatting).
• XSL / XSLT are XML based languages.
• XSLT is the most common part and it is supported in most web browsers.

What is XSL(T)?#

XSLT Basics#

• XSLT processes nodes of XML document.
  • Uses pattern matching to identify the nodes.
  • Performs transformation on those nodes.
  • Creates a new document.

Types of XSLT nodes#

Creating XSLT Stylesheets#

XSLT templates#

• Describe the output based on the matched pattern.
• Templates can be invoked: Template for creating an output
  Can be called by name or by matching nodes against a pattern
  It is a declaration, so appears asa child mode of the stylesheet element

1
<xsl:template match="nodePattern">
2
<xsl:template name="templateName">

1
<xsl:apply-templates select='Movies/Movie/Name’/>
2
...
3
<xsl:template match='Movies/Movie/Name'>

1
<xsl:call-template name='temp1’/>
2
...
3
<xsl:template name='temp1'>

1
<xsl:apply-templates select='nodePattern'>

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<xsl:call-template name='templateName'>

Warmer Part 1#

• Discuss which type of calling templates would work best in different scenarios?

XSLT Functions#

• Template construct (What to do)
  • xsl: value-of
  • xsl: for-each
  • xsl: if
  • xsl: choose

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<xsl:choose>
2
    <xsl:when test="condition"> <xsl:when>
3
    <xsl:otherwise> </xsl:otherwise>
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</xsl:choose>

XSLT Patterns#

• / Document Root
• .. Parent node
• . Current node
• // Child node

XSLT Expressions#

• = equal
• != not equal
• < less than
• > greater than
• and
• or

XSLT Math Functions#

• ceiling() round decimal up to the nearest integer.
• floor() round decimal down to the nearest integer.
• count() determine the quantity in a set.
• sum() add numbers together.

XSLT Attributes#

When you want to select an attribute in an XPath expression, you use the @ symbol.

XSLT Sorting (ascending | descending)#

The XSL “sort” element goes inside an element at the beginning of the sequence constructor to determine the order that the elements will be output in.