Xpath,XLink & XPointer

1. XPath:locate nodes and fragments
   • used both in XPointer,XSL,XML Schema,XQuery
2. XLink:a generalization of the HTML link concept
3. XPointer: an extension of XPath suited for linking
   • specifies connection bewteen Xpath expressions and URIs
4. XPath:
   • / root directory
   • /users/dave every dave in every users below the root
   • . the current directory
   • .. the upper directory
   • // any elements
   • [] start from 1
   • last() [last()]
   • * wild card
   • @attribute chapter[not@num]