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XPath - XML Path Language

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XPath - XML Path Language

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XPath - XML Path Language XML http://yht4ever.blogspot.com [email_address] B070066 - NIIT Quang Trung 08/2007
Contents Exercises Node-set Operators and Functions Location Paths Nodes Introduction
Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Nodes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Simple XML document 1 <?xml version = &quot;1.0&quot; ?> 2 3 <!-- simple.xml --> 4 <!-- Simple XML document --> 5 6 <book title = “C++ How to Program&quot; edition = &quot;3&quot; > 7 8 <sample> 9 <![CDATA[ 10 11 // C++ comment 12 if ( this->getX() < 5 && value[ 0 ] != 3 ) 13 cerr << this->displayError(); 14 ]]> 15 </sample> 16 17 C++ How to Program by Deitel &amp; Deitel 18 </book> Root node Comment nodes Attribute nodes Element nodes Text nodes
XPath tree for simple.xml Attribute Title C++ How to Program Element book Comment Fig. 11.1 : simple.xml Comment Simple XML document Attribute edition 3 Root Text C++ How to Program by Deitel & Deitel Element sample Text // C++ comment if (this -> getX() < 5 && value[ 0 ] != 3 ) cerr << this->displayError();
XML document with processing-instruction and namespace nodes 1 <?xml version = &quot;1.0&quot; ?> 2 3 <!-- Fig. 11.3 : simple2.xml --> 4 <!-- Processing instructions and namespacess --> 5 6 <html xmlns = &quot;http://www.w3.org/TR/REC-html40&quot; > 7 8 <head> 9 <title> Processing Instruction and Namespace Nodes </title> 10 </head> 11 12 <?deitelprocessor example = &quot;fig11_03.xml&quot; ?> 13 14 <body> 15 16 <deitel:book deitel:edition = &quot;1&quot; 17 xmlns:deitel = &quot;http://www.deitel.com/xmlhtp1&quot; > 18 <deitel:title> XML How to Program </deitel:title> 19 </deitel:book> 20 21 </body> 22 23 </html> Root node Comment nodes Namespace nodes Processing instruction node Element nodes Text nodes Attribute nodes
Tree diagram of an XML document with a processing-instruction node Continued on next slide ... Root Comment Fig. 11.3 : simple2.xml Comment Processing instructions and namespaces Element html Namespace http://www.w3.org/TR/REC-html40 Element head Text Processing instructions and Namespcae Nodes Element title
Tree diagram of an XML document with a processing-instruction node Continued from previous slide Processing Instruction deitelprocessor example = &quot; fig11_03.xml &quot; Element body Element book Attribute edition 1 Namespace http://www.deitel.com/xmlhtp1 Element title Text XML How to Program
XPath node types
XPath node types (cont.)
Location Paths ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Axes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
XPath axes
Node Tests ,[object Object],[object Object],[object Object],[object Object]
Some XPath node tests
Location Paths Using Axes and Node Tests ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Some location-path abbreviations
Node-set Operators and Functions ,[object Object],[object Object],[object Object],[object Object]
Node-set operators
Some node-set functions
Node-set Operators and Functions (cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
1 <?xml version = &quot;1.0&quot; ?> 2 3 <!-- Fig. 11.13 : stocks.xml --> 4 <!-- Stock list --> 5 6 <stocks> 7 8 <stock symbol = &quot;INTC&quot; > 9 <name> Intel Corporation </name> 10 </stock> 11 12 <stock symbol = &quot;CSCO&quot; > 13 <name> Cisco Systems, Inc. </name> 14 </stock> 15 16 <stock symbol = &quot;DELL&quot; > 17 <name> Dell Computer Corporation </name> 18 </stock> 19 20 <stock symbol = &quot;MSFT&quot; > 21 <name> Microsoft Corporation </name> 22 </stock> 23 24 <stock symbol = &quot;SUNW&quot; > 25 <name> Sun Microsystems, Inc. </name> 26 </stock> 27 28 <stock symbol = &quot;CMGI&quot; > 29 <name> CMGI, Inc. </name> 30 </stock> 31 32 </stocks>
1 <?xml version = &quot;1.0&quot; ?> 2 3 <!-- Fig. 11.14 : stocks.xsl --> 4 <!-- string function usage --> 5 6 <xsl:stylesheet version = &quot;1.0&quot; 7 xmlns:xsl = &quot;http://www.w3.org/1999/XSL/Transform&quot; > 8 9 <xsl:template match = &quot;/stocks&quot; > 10 <html> 11 <body> 12 <ul> 13 14 <xsl:for-each select = &quot;stock&quot; > 15 16 <xsl:if test = 17 &quot;starts-with(@symbol, 'C')&quot; > 18 19 <li> 20 <xsl:value-of select = 21 &quot;concat(@symbol,' - ', name)&quot; /> 22 </li> 23 </xsl:if> 24 25 </xsl:for-each> 26 </ul> 27 </body> 28 </html> 29 </xsl:template> 30 </xsl:stylesheet> XPath string functions
Reference ,[object Object],[object Object],[object Object]
Q&A ,[object Object],[object Object]
http://yht4ever.blogspot.com Thank You !

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XPath - XML Path Language

  • 1. XPath - XML Path Language XML http://yht4ever.blogspot.com [email_address] B070066 - NIIT Quang Trung 08/2007
  • 2. Contents Exercises Node-set Operators and Functions Location Paths Nodes Introduction
  • 3.
  • 4.
  • 5. Simple XML document 1 <?xml version = &quot;1.0&quot; ?> 2 3 <!-- simple.xml --> 4 <!-- Simple XML document --> 5 6 <book title = “C++ How to Program&quot; edition = &quot;3&quot; > 7 8 <sample> 9 <![CDATA[ 10 11 // C++ comment 12 if ( this->getX() < 5 && value[ 0 ] != 3 ) 13 cerr << this->displayError(); 14 ]]> 15 </sample> 16 17 C++ How to Program by Deitel &amp; Deitel 18 </book> Root node Comment nodes Attribute nodes Element nodes Text nodes
  • 6. XPath tree for simple.xml Attribute Title C++ How to Program Element book Comment Fig. 11.1 : simple.xml Comment Simple XML document Attribute edition 3 Root Text C++ How to Program by Deitel & Deitel Element sample Text // C++ comment if (this -> getX() < 5 && value[ 0 ] != 3 ) cerr << this->displayError();
  • 7. XML document with processing-instruction and namespace nodes 1 <?xml version = &quot;1.0&quot; ?> 2 3 <!-- Fig. 11.3 : simple2.xml --> 4 <!-- Processing instructions and namespacess --> 5 6 <html xmlns = &quot;http://www.w3.org/TR/REC-html40&quot; > 7 8 <head> 9 <title> Processing Instruction and Namespace Nodes </title> 10 </head> 11 12 <?deitelprocessor example = &quot;fig11_03.xml&quot; ?> 13 14 <body> 15 16 <deitel:book deitel:edition = &quot;1&quot; 17 xmlns:deitel = &quot;http://www.deitel.com/xmlhtp1&quot; > 18 <deitel:title> XML How to Program </deitel:title> 19 </deitel:book> 20 21 </body> 22 23 </html> Root node Comment nodes Namespace nodes Processing instruction node Element nodes Text nodes Attribute nodes
  • 8. Tree diagram of an XML document with a processing-instruction node Continued on next slide ... Root Comment Fig. 11.3 : simple2.xml Comment Processing instructions and namespaces Element html Namespace http://www.w3.org/TR/REC-html40 Element head Text Processing instructions and Namespcae Nodes Element title
  • 9. Tree diagram of an XML document with a processing-instruction node Continued from previous slide Processing Instruction deitelprocessor example = &quot; fig11_03.xml &quot; Element body Element book Attribute edition 1 Namespace http://www.deitel.com/xmlhtp1 Element title Text XML How to Program
  • 11. XPath node types (cont.)
  • 12.
  • 13.
  • 15.
  • 17.
  • 19.
  • 22.
  • 23. 1 <?xml version = &quot;1.0&quot; ?> 2 3 <!-- Fig. 11.13 : stocks.xml --> 4 <!-- Stock list --> 5 6 <stocks> 7 8 <stock symbol = &quot;INTC&quot; > 9 <name> Intel Corporation </name> 10 </stock> 11 12 <stock symbol = &quot;CSCO&quot; > 13 <name> Cisco Systems, Inc. </name> 14 </stock> 15 16 <stock symbol = &quot;DELL&quot; > 17 <name> Dell Computer Corporation </name> 18 </stock> 19 20 <stock symbol = &quot;MSFT&quot; > 21 <name> Microsoft Corporation </name> 22 </stock> 23 24 <stock symbol = &quot;SUNW&quot; > 25 <name> Sun Microsystems, Inc. </name> 26 </stock> 27 28 <stock symbol = &quot;CMGI&quot; > 29 <name> CMGI, Inc. </name> 30 </stock> 31 32 </stocks>
  • 24. 1 <?xml version = &quot;1.0&quot; ?> 2 3 <!-- Fig. 11.14 : stocks.xsl --> 4 <!-- string function usage --> 5 6 <xsl:stylesheet version = &quot;1.0&quot; 7 xmlns:xsl = &quot;http://www.w3.org/1999/XSL/Transform&quot; > 8 9 <xsl:template match = &quot;/stocks&quot; > 10 <html> 11 <body> 12 <ul> 13 14 <xsl:for-each select = &quot;stock&quot; > 15 16 <xsl:if test = 17 &quot;starts-with(@symbol, 'C')&quot; > 18 19 <li> 20 <xsl:value-of select = 21 &quot;concat(@symbol,' - ', name)&quot; /> 22 </li> 23 </xsl:if> 24 25 </xsl:for-each> 26 </ul> 27 </body> 28 </html> 29 </xsl:template> 30 </xsl:stylesheet> XPath string functions
  • 25.
  • 26.