XSLT and XPath Overview

1
Unit 3

• XSLT and XPath Overview

2
Section Objectives

• Introduction
• XPath
• Applying Stylesheets
• XSLT Language

3
Introduction to Extensible Stylesheet Language
(XSL)

• DOM Used to Navigate and Edit
• XSL used to Transform and Format
• XSLT Recommendation
• Our Focus
• Presentation use CSS
• Covered Later

4
XSL Transformations (XSLT)

• Transform XML
• XML to another XML
• XML to file
• XML to HTML
• XSLT is well-formed XML
• Inter-Application Communication

5
XSL Processor
Transformed and Formatted Document
XSL Processor
6
Section Objectives

• Introduction
• XPath
• Applying Stylesheets
• XSLT Language

7
XPath Abbreviated Notation
8
XPath Abbreviated Notation
9
XPath Pattern Filters

• Node Index Position
• Node Test
• text()
• comment()
• processing-instruction()
• node()
• Core Function Library

10
Section Objectives

• Introduction
• XPath
• Applying Stylesheets
• XSLT Language

11
XSL Root Element
lt?xml version "1.0"?gt ltxslstylesheet xmlnsxsl
"http//www.w3.org/TR/WD-xsl"gt   all other
declarations   lt/xslstylesheetgt
12
Applying XSL Stylesheets to XML
  lt?xml-stylesheet type "text/xsl" href
"XSLFile.xsl"?gt  
13
Basic XSL Elements and Operations

• XML is Tree-based
• XSLT Processor
• One XML Tree -gt Another XML Tree
• Key Selection is Template
• Processor Applies Templates

14
Section Objectives

• Introduction
• XPath
• Applying Stylesheets
• XSLT Language

15
xsltemplate
ltxsltemplate match pattern name qname
priority number, mode qnamegt instructions
lt/xsltemplategt
If for instance an XML document has an
element   ltitemgtThis is some textlt/itemgt   then
a template that matches this node could be
defined as
ltxsltemplate match itemgt lt/xsltemplategt
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XSL Document Structure and Processor Action
lt?xml version "1.0"?gt ltxslstylesheet xmlnsxsl
""gt ltxsltemplate match patterngt actions lt/xs
ltemplategt ltxsltemplate match pattern
gt actions lt/xsltemplategt ltxsltemplate match
pattern gt actions lt/xsltemplategt
etc lt/xslstylesheetgt
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XSL Document Structure and Processor Action
The top-level template is The pattern /
means the root node of the document
ltxsltemplate match "/"gt instructions
lt/xsltemplategt
18
xslvalue-of
ltxslvalue-of  select pattern disable-output-e
scaping "yes" "no" /gt
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xslvalue-of Example
Example01.xml
Example01.xsl
Run Example01.bat
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xslvalue-of Example
Example01.xml
Example02.xsl
Run Example02.bat
21
xslapply-templates
ltxslapply-templates select pattern  mode
qname/gt
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Patterns

• Patterns for Filtering
• Conflicts in Matching Process

23
XPath Relational Operators
24
XPath Boolean Operators

25
XPath Boolean Functions
26
Control Flow
27
Copying XML Elements to Output
ltxslcopy use-attribute-sets qnamesgtlt/xslcop
ygt ltxslcopy-of select expression /gt
Example13a.xsl and Example13b.xsl use with
Example10.xml Run Example13.bat
28
Creating New XML

• xslattribute
• xslattribute-set
• xslelement
• xslcomment
• xslprocessing-instruction