What are Node Type of DOM used for?

[Tina <rj...@gmail.com>]

Hi all,

I know that there are the following kind of node type in DOM. Could
any one tell me what does each node type stand for and how can I use
them?  For example, what is the difference from ENTITY_REFERENCE_NODE
and ENTITY_NODE ?  And how can I generate a DOCUMENT_FRAGMENT_NODE
type node or NOTATION_NODE ? I'm really new on XML, and hope I can get
some help on this famous list! Thanks!

    enum NodeType {
        ELEMENT_NODE                = 1,
        ATTRIBUTE_NODE              = 2,
        TEXT_NODE                   = 3,
        CDATA_SECTION_NODE          = 4,
        ENTITY_REFERENCE_NODE       = 5,
        ENTITY_NODE                 = 6,
        PROCESSING_INSTRUCTION_NODE = 7,
        COMMENT_NODE                = 8,
        DOCUMENT_NODE               = 9,
        DOCUMENT_TYPE_NODE          = 10,
        DOCUMENT_FRAGMENT_NODE      = 11,
        NOTATION_NODE               = 12
    };
-- 

Best wishes.
Tina ^_^