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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
- 5. Simple XML document 1 <?xml version = "1.0" ?> 2 3 <!-- simple.xml --> 4 <!-- Simple XML document --> 5 6 <book title = “C++ How to Program" edition = "3" > 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 & 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 = "1.0" ?> 2 3 <!-- Fig. 11.3 : simple2.xml --> 4 <!-- Processing instructions and namespacess --> 5 6 <html xmlns = "http://www.w3.org/TR/REC-html40" > 7 8 <head> 9 <title> Processing Instruction and Namespace Nodes </title> 10 </head> 11 12 <?deitelprocessor example = "fig11_03.xml" ?> 13 14 <body> 15 16 <deitel:book deitel:edition = "1" 17 xmlns:deitel = "http://www.deitel.com/xmlhtp1" > 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 = " fig11_03.xml " Element body Element book Attribute edition 1 Namespace http://www.deitel.com/xmlhtp1 Element title Text XML How to Program
- 10. XPath node types
- 11. XPath node types (cont.)
- 14. XPath axes
- 16. Some XPath node tests
- 23. 1 <?xml version = "1.0" ?> 2 3 <!-- Fig. 11.13 : stocks.xml --> 4 <!-- Stock list --> 5 6 <stocks> 7 8 <stock symbol = "INTC" > 9 <name> Intel Corporation </name> 10 </stock> 11 12 <stock symbol = "CSCO" > 13 <name> Cisco Systems, Inc. </name> 14 </stock> 15 16 <stock symbol = "DELL" > 17 <name> Dell Computer Corporation </name> 18 </stock> 19 20 <stock symbol = "MSFT" > 21 <name> Microsoft Corporation </name> 22 </stock> 23 24 <stock symbol = "SUNW" > 25 <name> Sun Microsystems, Inc. </name> 26 </stock> 27 28 <stock symbol = "CMGI" > 29 <name> CMGI, Inc. </name> 30 </stock> 31 32 </stocks>
- 24. 1 <?xml version = "1.0" ?> 2 3 <!-- Fig. 11.14 : stocks.xsl --> 4 <!-- string function usage --> 5 6 <xsl:stylesheet version = "1.0" 7 xmlns:xsl = "http://www.w3.org/1999/XSL/Transform" > 8 9 <xsl:template match = "/stocks" > 10 <html> 11 <body> 12 <ul> 13 14 <xsl:for-each select = "stock" > 15 16 <xsl:if test = 17 "starts-with(@symbol, 'C')" > 18 19 <li> 20 <xsl:value-of select = 21 "concat(@symbol,' - ', name)" /> 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