Tree in XML
Tree in XML
What is the XML Tree?
XML documents have a tree structure.
This structure is called the Document Object Model (DOM).
The XML elements are organized hierarchically, like nodes in a tree.
XML Tree Structure Components
Root Node: The single top-level element that contains all other elements.
Parent Node: An element that contains child elements.
Child Node: An element contained inside a parent element.
Sibling Nodes: Elements that share the same parent.
Leaf Node: An element with no children (end node).
Attributes: Properties of elements (not tree nodes but associated with nodes).
Example XML Document as a Tree
<library> <book id="1"> <title>XML Guide</title> <author>Jane Doe</author> </book> <book id="2"> <title>Learning XML</title> <author>John Smith</author> </book></library>Corresponding Tree View
library (root)??? book (id=1)? ??? title: "XML Guide"? ??? author: "Jane Doe"??? book (id=2) ??? title: "Learning XML" ??? author: "John Smith"How Tree Helps in XML Processing
The hierarchical tree allows programs to navigate, search, and modify XML data.
Most XML parsers provide a DOM API to work with this tree structure.
Summary
| Term | Description |
|---|---|
| Root Node | The top-level element of XML |
| Parent Node | An element containing other elements |
| Child Node | Elements inside a parent element |
| Sibling Nodes | Elements with the same parent |
| Leaf Node | Element with no children |
| Attributes | Properties attached to elements (not nodes) |
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