XML DOM Node Types
The DOM presents a document as a hierarchy of node objects.
Examples
The examples below use the XML file
books.xml.
A function, loadXMLDoc(), in an external JavaScript is used to load the XML file.
Display nodeName and nodeType of all elements
Display nodeName and nodeValue of all elements
Node Types
The following table lists the different W3C node types, and which node types they
may have as children:
| Node type |
Description |
Children |
| Document |
Represents the entire document (the root-node of the DOM tree) |
Element (max. one), ProcessingInstruction, Comment, DocumentType |
| DocumentFragment |
Represents a "lightweight" Document object, which
can hold a portion of a document |
Element, ProcessingInstruction, Comment, Text, CDATASection,
EntityReference |
| DocumentType |
Provides an interface to the entities defined for the
document |
None |
| ProcessingInstruction |
Represents a processing instruction |
None |
| EntityReference |
Represents an entity reference |
Element, ProcessingInstruction, Comment, Text, CDATASection,
EntityReference |
| Element |
Represents an element |
Element, Text, Comment, ProcessingInstruction, CDATASection,
EntityReference |
| Attr |
Represents an attribute |
Text, EntityReference |
| Text |
Represents textual content in an element
or attribute |
None |
| CDATASection |
Represents a CDATA section in a document (text that will
NOT be parsed by a parser) |
None |
| Comment |
Represents a comment |
None |
| Entity |
Represents an entity |
Element, ProcessingInstruction, Comment, Text, CDATASection,
EntityReference |
| Notation |
Represents a notation declared in the DTD |
None |
Node Types - Return Values
The following table lists what the nodeName and the nodeValue properties will return
for each node type:
| Node type |
nodeName returns |
nodeValue returns |
| Document |
#document |
null |
| DocumentFragment |
#document fragment |
null |
| DocumentType |
doctype name |
null |
| EntityReference |
entity reference name |
null |
| Element |
element name |
null |
| Attr |
attribute name |
attribute value |
| ProcessingInstruction |
target |
content of node |
| Comment |
#comment |
comment text |
| Text |
#text |
content of node |
| CDATASection |
#cdata-section |
content of node |
| Entity |
entity name |
null |
| Notation |
notation name |
null |
NodeTypes - Named Constants
| NodeType |
Named Constant |
| 1 |
ELEMENT_NODE |
| 2 |
ATTRIBUTE_NODE |
| 3 |
TEXT_NODE |
| 4 |
CDATA_SECTION_NODE |
| 5 |
ENTITY_REFERENCE_NODE |
| 6 |
ENTITY_NODE |
| 7 |
PROCESSING_INSTRUCTION_NODE |
| 8 |
COMMENT_NODE |
| 9 |
DOCUMENT_NODE |
| 10 |
DOCUMENT_TYPE_NODE |
| 11 |
DOCUMENT_FRAGMENT_NODE |
| 12 |
NOTATION_NODE |
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