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4. Introducing ranges and points

This tutorial is obsolete. Please, use the new one.

Description

XPointer is built on top of the XPath and the extensions allow enhancements in addressing.



Addressing nodes (XPath can)
XPointer can of course address nodes as well as XPath does. The XPointer expressions will be shown later in the tutorial.

 <AAA>
   <BBB bbb="111">
     Text in the first element BBB.</BBB>
   <BBB bbb="222">
     Text in another element BBB.
     <DDD ddd="999">
       Text in more nested element.</DDD>
   </BBB>
   <CCC ccc="123" xxx="321">
     Again some text in some element.</CCC>
 </AAA>
  • X marks point (zero width)
  • This style marks the container node.
  • This style marks resulting locations.
  • X marks collapsed range (zero width)


Addressing of ranges (XPath can not)
It is possible to address also ranges. This is not possible in XPath. The XPointer expressions will be shown later in the tutorial.

 <AAA>
   <BBB bbb="111">
     Text in the first element BBB.</BBB>
   <BBB bbb="222">
     Text in another element BBB.
     <DDD ddd="999">
       Text in more nested element.</DDD>
   </BBB>
   <CCC ccc="123" xxx="321">
     Again some text in some element.</CCC>
 </AAA>
  • X marks point (zero width)
  • This style marks the container node.
  • This style marks resulting locations.
  • X marks collapsed range (zero width)


Addressing of points (XPath can not)
It is possible to address points. This is not possible in XPath. The XPointer expressions will be shown later in the tutorial.

 <AAA>
   <BBB bbb="111">
     Text in the first element BBB.</BBB>
   <BBB bbb="222">
     Text in another element BBB.
     <DDD ddd="999">
       Text in more nested element.</DDD>
   </BBB>
   <CCC ccc="123" xxx="321">Again someX text in some element.</CCC>
 </AAA>
  • X marks point (zero width)
  • This style marks the container node.
  • This style marks resulting locations.
  • X marks collapsed range (zero width)



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