What's the difference between an element and a node in XML?
I\'m working in Java with XML and I\'m wondering; what\'s the difference between an element and a node?
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An element is a type of node as are attributes, text etc.
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An xml document is made of nested elements. An element begins at its opening tag and ends at its closing tag. You're probably seen
<body>and</body>in html. Everything between the opening and closing tags is the element's content. If an element is defined by a self-closing tag (eg.<br/>) then its content is empty.Opening tags can also specify attributes, eg.
<p class="rant">. In this example the attribute name is 'class' and its value 'rant'.The XML language has no such thing as a 'node'. Read the spec, the word doesn't occur.
Some people use the word 'node' informally to mean element, which is confusing because some parsers also give the word a technical meaning (identifying 'text nodes' and 'element nodes'). The exact meaning depends on the parser, so the word is ill-defined unless you state what parser you are using. If you mean element, say 'element'.
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A node is the base class for both elements and attributes (and basically all other XML representations too).
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node & element are same. Every element is a node , but it's not that every node must be an element.
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Element is the only kind of node that can have child nodes and attributes.
Document also has child nodes, BUT
no attributes, no text, exactly one child element.讨论(0) -
A node can be a number of different kinds of things: some text, a comment, an element, an entity, etc. An element is a particular kind of node.
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