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David Gelpi Fleta's List: XPATH

XPath Syntax

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XML XPATH XSLT XSL on 2009-01-12 and saved by 15 people
- Selecting Nodes
  
  XPath uses path expressions to select nodes in an XML document.
- Expression
  Description
  
  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
- 10 more annotations...
- - Predicates
    
    Predicates are used to find a specific node or a node that contains a
    specific value.
  - Predicates are always embedded in square brackets.
  - [1]
  - [last()]
  - [position()<3]
  - [@lang]
  - [@lang='eng']
  - [price>35.00]
  - Wildcard
    Description
    
    *
    Matches any element node
    
    @*
    Matches any attribute node
    
    node()
    Matches any node of any kind
  - Selecting Several Paths
    
    By using the | operator in an XPath expression you can select several paths.
XPath Operators

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XPATH XML PSI XSLT on 2009-01-12 and saved by 3 people
- XPath Operators
XPath Nodes

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on 2009-01-12 and saved by 4 people
- In XPath, there are seven kinds of nodes: element, attribute,
  text, namespace, processing-instruction, comment, and document (root) nodes.
- XML documents are treated as trees of nodes. The root of the tree is called the
  document node (or root node).
- 6 more annotations...
- - Atomic values
    
    Atomic values are nodes with no children or parent.
  - Children
    
    Element nodes may have zero, one or more children.
  - Relationship of Nodes
    
    Parent
    
    Each element and attribute has one parent.
  - Siblings
    
    Nodes that have the same parent.
  - Ancestors
    
    A node's parent, parent's parent, etc.
  - Descendants
    
    A node's children, children's children, etc.
Introduction to XPath

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on 2009-01-12 and saved by 10 people
- XPath is a language for finding information in an XML document
- What is XPath?
  
  XPath is a syntax for defining parts of an XML document
  XPath uses path expressions to navigate in XML documents
  XPath contains a library of standard functions
  XPath is a major element in XSLT
  XPath is a W3C recommendation

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David Gelpi Fleta

4 items | 9 visits

Updated on 2009-01-12
Created on 2009-01-12

Category: Computers & Internet

XML XPATH XSL XSLT PSI

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David Gelpi Fleta's List: XPATH

XPath Syntax

Selecting Nodes

Predicates

Selecting Several Paths

XPath Operators

XPath Nodes

Atomic values

Children

Relationship of Nodes

Parent

Siblings

Ancestors

Descendants

Introduction to XPath

What is XPath?

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