DevGuru XML DOM Attr Object



			OBJECT: Attr
			The Attr interface represents an attribute of an Element object. Allowable values for this object are usually defined in some sort of document type definition. The Attr object is also a Node and as such inherits a number of that object's properties and methods. However, an attribute is not considered by the DOM to be a child node of an element, but rather a property of it, and so cannot have a value other than null for the parentNode, previousSibling or nextSibling properties. The value of an attribute is represented by the child nodes because the value can contain entity references. Where this is the case the child list will contain both text and entityReference nodes. Because the attribute type may be unknown, there are no tokenized attribute values. The following example uses the 'states.xml' file and creates a NamedNodeMap of the attributes of the first child of the root element. The code then displays their name and value properties. XML: <States> <State ref="FL" const="27"> <name>Florida</name> <capital>Tallahassee</capital> </State> <State ref="IA" const="29"> <name>Iowa</name> <capital>Des Moines</capital> </State> </States> Code (VBScript): Set objXMLDoc = CreateObject("Microsoft.XMLDOM") objXMLDoc.async = False objXMLDoc.load("states.xml") Set objFirstChild = objXMLDoc.documentElement.firstChild Set objAttributes = objFirstChild.attributes For Each Attr in objAttributes document.write(Attr.name & " ") document.write(Attr.value & "<br>") Next Output: Ref FL const 27 For details of the values returned by the nodeName, nodeType and nodeValue properties for an Attr, see the Node object. denotes a Microsoft extension to the W3C DOM. PROPERTIES attributes Property This is a read-only property that returns a NamedNodeMap for nodes that can have attributes. Syntax: Node.attributes baseName Property This is a read-only property that returns the base name for a node. Syntax: Node.baseName childNodes Property This is a read-only property containing a node list of all children for those elements that can have them. Syntax: Node.childNodes dataType Property This is a read-only property that specifies the data type for the node. Syntax: Node.dataType definition Property This property returns the definition of the node in the DTD or schema. Syntax: Node.definition firstChild Property This is a read-only property that returns the first child node of a node. If there is none, it returns null. Syntax: Node.firstChild lastChild Property This is a read-only property that returns the last child node of a node. If there is none, it returns null. Syntax: Node.lastChild name Property This property returns the name of the attribute, and is the same as the nodeName property for this Node object. Syntax: Attr.name namespaceURI Property This property is read-only and returns the URI (Universal Resource Indentifier) of the namespace. Syntax: Node.namespaceURI nextSibling Property This property returns the next node in the parent's child list, or null if there is none or the node is of a type that cannot be a child node (Attr, Document, DocumentFragment). Syntax: Node.nextSibling nodeName Property This property is read-only and contains the name of the node, depending on type. Syntax: Node.nodeName nodeType Property This is a read-only property specifying the type of the node. Syntax: Node.nodeType nodeTypedValue Property This property contains the value of this node expressed in its defined data type. Syntax: Node.nodeTypedValue nodeTypeString Property This property is read-only and returns the node type in string form. Syntax: Node.nodeTypeString nodeValue Property This property contains the value of the node, depending on type. Syntax: Node.nodeValue ownerDocument Property This property returns the Document object to which the node belongs. If the node itself is a document, then it returns null. Syntax: Node.ownerDocument parentNode Property This is a read-only property that returns the parent node of all nodes except Document, DocumentFragment and Attr, which cannot have parent nodes. Syntax: Node.parentNode parsed Property This property returns a boolean value of true if this node and all of its descendants have been parsed and instantiated. Otherwise it returns false. Syntax: Node.parsed prefix Property This property is read-only and returns the namespace prefix, or an empty string if none is specified. For example, it would return 'xxx' for the element <xxx:yyy>. Syntax: Node.prefix previousSibling Property This property returns the previous node in the parent's child list, or null if there is none or the node is of a type that cannot be a child node (Attr, Document, DocumentFragment). Syntax: Node.previousSibling specified Property This property returns a boolean value which indicates whether or not this attribute has a value specified in the XML document. Syntax: Node.specified text Property This property contains the text content of this node and its subtrees. Syntax: Node.text value Property This property returns the value for the attribute. Syntax: Attr.value xml Property This property contains the XML representation of this node and its descendants. Syntax: Node.xml METHODS appendChild Method This method appends a new child node to the list of children for this node. Syntax: Node.appendChild(tagName) cloneNode Method This method creates a clone node which is an exact replica of this node. Syntax: Node.cloneNode(deep) hasChildNodes Method This method is a convenient way to determine whether a node has child nodes, returning true if it has, and false if not. Syntax: Node.hasChildNodes( ) insertBefore Method This method is used to insert a new child node before an existing one. If no child node exists, the new child node becomes the first. Syntax: Node.insertBefore(newChild, refChild) removeChild Method This method removes the specified node from the list of children and returns it. Syntax: Node.removeChild(oldChild) replaceChild Method This method is used to replace one of a node's children with another. It returns the old child. Syntax: Node.replaceChild(newChild, oldChild) selectNodes Method This method creates a NodeList of all the matching descendant nodes returned by the specified pattern-matching operation. Syntax: Node.selectNodes(patternString) selectSingleNode Method This method returns a Node object for the first descendant node to match the specified pattern. Syntax: Node.selectSingleNode(patternString) transformNode Method This method processes this node and its descendants using the specified XSL stylesheet, and returns the resulting transformation. Syntax: Node.transformNode(stylesheet) transformNodeToObject Method This method processes this node and its descendants using the specified XSL stylesheet, and returns the resulting transformation in the specified object. Syntax: Node.transformNodeToObject(stylesheet, outputObject)