XML DOM Tutorial
DOM HOMEDOM Introduction
DOM Nodes
DOM Node Tree
DOM Parser
DOM Load Function
DOM Methods
DOM Accessing
DOM Node Info
DOM Node List
DOM Traversing
DOM Browsers
DOM Navigating
Manipulate Nodes
DOM Get ValuesDOM Change Nodes
DOM Remove Nodes
DOM Replace Nodes
DOM Create Nodes
DOM Add Nodes
DOM Clone Nodes
DOM XMLHttpRequest
XML DOM Reference
DOM Node TypesDOM Node
DOM NodeList
DOM NamedNodeMap
DOM Document
DOM DocumentImpl
DOM DocumentType
DOM ProcessingInstr
DOM Element
DOM Attribute
DOM Text
DOM CDATA
DOM Comment
DOM XMLHttpRequest
DOM ParseError Obj
DOM Parser Errors
DOM Summary
XML DOM Examples
DOM ExamplesDOM Validator
XML DOM Nodes
In the DOM, everything in an XML document is a node.
DOM Nodes
According to the DOM, everything in an XML document is a node.
The DOM says:
- The entire document is a document node
- Every XML element is an element node
- The text in the XML elements are text nodes
- Every attribute is an attribute node
- Comments are comment nodes
DOM Example
Look at the following XML file (books.xml):
<bookstore>
<book category="cooking">
<title lang="en">Everyday Italian</title>
<author>Giada De Laurentiis</author>
<year>2005</year>
<price>30.00</price>
</book>
<book category="children">
<title lang="en">Harry Potter</title>
<author>J K. Rowling</author>
<year>2005</year>
<price>29.99</price>
</book>
<book category="web">
<title lang="en">XQuery Kick Start</title>
<author>James McGovern</author>
<author>Per Bothner</author>
<author>Kurt Cagle</author>
<author>James Linn</author>
<author>Vaidyanathan Nagarajan</author>
<year>2003</year>
<price>49.99</price>
</book>
<book category="web" cover="paperback">
<title lang="en">Learning XML</title>
<author>Erik T. Ray</author>
<year>2003</year>
<price>39.95</price>
</book>
</bookstore>
The root node in the XML above is named <bookstore>. All other nodes in the document are contained within <bookstore>.
The root node <bookstore> holds four <book> nodes.
The first <book> node holds four nodes: <title>, <author>, <year>, and <price>, which contains one text node each, "Everyday Italian", "Giada De Laurentiis", "2005", and "30.00".
Text is Always Stored in Text Nodes
A common error in DOM processing is to expect an element node to contain text.
However, the text of an element node is stored in a text node.
In this example: <year>2005</year>, the element node <year>, holds a text node with the value "2005".
"2005" is not the value of the <year> element!
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