6. February 2009
<?xml version=“1.0“ encoding=“ISO-8859-1“?>
<bookstore>
<book>
<title lang=“eng“>Harry Potter</title>
<price>29.99</price>
</book>
<book>
<title lang=“eng“>Learning XML</title>
<price>39.95</price>
</book>
</bookstore>
Expression | Bedeutung |
---|---|
nodename | Selects all child nodes of the named node |
/ | 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 | Selects all the child nodes of the bookstore element |
/bookstore | Selects the root element bookstore Note: If the path starts with a slash ( / ) it always represents an absolute path to an element! |
bookstore/book | Selects all book elements that are children of bookstore |
//book | Selects all book elements no matter where they are in the document |
bookstore//book | Selects all book elements that are descendant of the bookstore element, no matter where they are under the bookstore element |
//@lang | Selects all attributes that are named lang |
/bookstore/book[1] | Selects the first book element that is the child of the bookstore element. |
/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 |
//title[@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 |
Wildcard | Description |
* | Matches any element node |
@* | Matches any attribute node |
node() | Matches any node of any kind |
/bookstore/* | Selects all the child nodes of the bookstore element |
//* | Selects all elements in the document |
//title[@*] | Selects all title elements which have any attribute |
//book/title | //book/price |
//title | //price |
/bookstore/book/title | //price |
AxisName | Result |
ancestor | Selects all ancestors (parent, grandparent, etc.) of the current node |
ancestor-or-self | Selects all ancestors (parent, grandparent, etc.) of the current node and the current node itself |
attribute | Selects all attributes of the current node |
child | Selects all children of the current node |
descendant | Selects all descendants (children, grandchildren, etc.) of the current node |
descendant-or-self | Selects all descendants (children, grandchildren, etc.) of the current node and the current node itself |
following | Selects everything in the document after the closing tag of the current node |
following-sibling | Selects all siblings after the current node |
namespace | Selects all namespace nodes of the current node |
parent | Selects the parent of the current node |
preceding | Selects everything in the document that is before the start tag of the current node |
preceding-sibling | Selects all siblings before the current node |
self | Selects the current node |
Example | Result |
child::book | Selects all book nodes that are children of the current node |
attribute::lang | Selects the lang attribute of the current node |
child::* | Selects all children of the current node |
attribute::* | Selects all attributes of the current node |
child::text() | Selects all text child nodes of the current node |
child::node() | Selects all child nodes of the current node |
descendant::book | Selects all book descendants of the current node |
ancestor::book | Selects all book ancestors of the current node |
ancestor-or-self::book | Selects all book ancestors of the current node - and the current as well if it is a book node |
child::*/child::price | Selects all price grandchildren of the current node |