XPATH Syntax, Operators
- XPath uses path expressions to select nodes or node-sets in an XML document
- The node is selected by following a path or steps
- The most useful path expressions are listed below:
Expression
|
Description
|
nodename
|
Selects all nodes with the name "nodename"
|
/
|
Selects from the root node
|
//
|
Selects nodes in the document from the current node that
match the selection no matter where they are
|
.
|
Selects the current node
|
..
|
Selects the parent of the current node
|
@
|
Selects attributes
|
/bookstore/book[1]
|
Selects the first book element that is the child of the
bookstore element.Note: 1E5 and later has implemented that [0] should be the
first node, but according to the W3C standard it should have been [1]!!
|
/bookstore/book[last()]
|
Selects the last book element that is the child of the
bookstore element
|
/bookstore/book[last()-1]
|
Selects the last but one book element that is the child
of the bookstore element
|
/bookstore/book[position()<3]
|
Selects the first two book elements that are children of
the bookstore element
|
//title[@lang]
|
Selects all the title elements that have an attribute
named lang
|
//titler@lang=’eng’]
|
Selects all the title elements that have an attribute
named lang with a value of 'eng'
|
/bookstore/book[price>35.00]
|
Selects all the book elements of the bookstore element
that have a price element with a value greater than 35.00
|
/bookstore/book[price>35.00]/title
|
Selects all the title elements of the book elements of
the bookstore element that have a price element with a value greater than
35.00
|
