XML::DOM::NamedNodeMap(3)				User Contributed Perl Documentation				 XML::DOM::NamedNodeMap(3)

NAME

       XML::DOM::NamedNodeMap - A hash table interface for XML::DOM

DESCRIPTION

       Objects implementing the NamedNodeMap interface are used to represent collections of nodes that can be accessed by name. Note that
       NamedNodeMap does not inherit from NodeList; NamedNodeMaps are not maintained in any particular order. Objects contained in an object
       implementing NamedNodeMap may also be accessed by an ordinal index, but this is simply to allow convenient enumeration of the contents of a
       NamedNodeMap, and does not imply that the DOM specifies an order to these Nodes.

       Note that in this implementation, the objects added to a NamedNodeMap are kept in order.

   METHODS
       getNamedItem (name)
	   Retrieves a node specified by name.

	   Return Value: A Node (of any type) with the specified name, or undef if the specified name did not identify any node in the map.

       setNamedItem (arg)
	   Adds a node using its nodeName attribute.

	   As the nodeName attribute is used to derive the name which the node must be stored under, multiple nodes of certain types (those that
	   have a "special" string value) cannot be stored as the names would clash. This is seen as preferable to allowing nodes to be aliased.

	   Parameters:
	    arg  A node to store in a named node map.

	   The node will later be accessible using the value of the nodeName attribute of the node. If a node with that name is already present in
	   the map, it is replaced by the new one.

	   Return Value: If the new Node replaces an existing node with the same name the previously existing Node is returned, otherwise undef is
	   returned.

	   DOMExceptions:

	   o   WRONG_DOCUMENT_ERR

	       Raised if arg was created from a different document than the one that created the NamedNodeMap.

	   o   NO_MODIFICATION_ALLOWED_ERR

	       Raised if this NamedNodeMap is readonly.

	   o   INUSE_ATTRIBUTE_ERR

	       Raised if arg is an Attr that is already an attribute of another Element object.  The DOM user must explicitly clone Attr nodes to
	       re-use them in other elements.

       removeNamedItem (name)
	   Removes a node specified by name. If the removed node is an Attr with a default value it is immediately replaced.

	   Return Value: The node removed from the map or undef if no node with such a name exists.

	   DOMException:

	   o   NOT_FOUND_ERR

	       Raised if there is no node named name in the map.

       item (index)
	   Returns the indexth item in the map. If index is greater than or equal to the number of nodes in the map, this returns undef.

	   Return Value: The node at the indexth position in the NamedNodeMap, or undef if that is not a valid index.

       getLength
	   Returns the number of nodes in the map. The range of valid child node indices is 0 to length-1 inclusive.

   Additional methods not in the DOM Spec
       getValues
	   Returns a NodeList with the nodes contained in the NamedNodeMap.  The NodeList is "live", in that it reflects changes made to the
	   NamedNodeMap.

	   When this method is called in a list context, it returns a regular perl list containing the values. Note that this list is not "live".
	   E.g.

	    @list = $map->getValues;	    # returns a perl list
	    $nodelist = $map->getValues;    # returns a NodeList (object ref.)
	    for my $val ($map->getValues)   # iterate over the values

       getChildIndex (node)
	   Returns the index of the node in the NodeList as returned by getValues, or -1 if the node is not in the NamedNodeMap.

       dispose
	   Removes all circular references in this NamedNodeMap and its descendants so the objects can be claimed for garbage collection. The
	   objects should not be used afterwards.

perl v5.16.3							    2000-01-31						 XML::DOM::NamedNodeMap(3)