R:

append.XMLNode	Add children to an XML node
append.xmlNode	Add children to an XML node
asXMLNode	Converts non-XML node objects to XMLTextNode objects
dtdElement	Gets the definition of an element or entity from a DTD.
dtdElementValidEntry	Determines whether an XML element allows a particular type of sub-element.
dtdEntity	Gets the definition of an element or entity from a DTD.
dtdIsAttribute	Query if a name is a valid attribute of a DTD element.
dtdValidElement	Determines whether an XML tag is valid within another.
length.XMLNode	Determine the number of children in an XMLNode object.
names.XMLNode	Get the names of an XML nodes children.
parseDTD	Read a Document Type Definition (DTD)
print.XMLAttributeDef	Methods for displaying XML objects
print.XMLCDataNode	Methods for displaying XML objects
print.XMLElementContent	Methods for displaying XML objects
print.XMLElementDef	Methods for displaying XML objects
print.XMLEntity	Methods for displaying XML objects
print.XMLEntityRef	Methods for displaying XML objects
print.XMLNode	Methods for displaying XML objects
print.XMLOrContent	Methods for displaying XML objects
print.XMLProcessingInstruction	Methods for displaying XML objects
print.XMLSequenceContent	Methods for displaying XML objects
supportsExpat	Determines which native XML parsers are being used.
supportsLibxml	Determines which native XML parsers are being used.
xmlApply	Applies a function to each of the children of an XMLNode
xmlAttributeType	The type of an XML attribute for element from the DTD
xmlAttrs	Get the list of attributes of an XML node.
xmlCDataNode	Create an XML node
xmlChildren	Gets the sub-nodes within an XMLNode object.
xmlContainsElement	Checks if an entity is defined within a DTD.
xmlContainsEntity	Checks if an entity is defined within a DTD.
xmlElementsByTagName	Retrieve the children of an XML node with a specific tag name
xmlEventParse	XML Event/Callback element-wise Parser
xmlHandler	Example XML Event Parser Handler Functions
xmlName	Extraces the tag name of an XMLNode object.
xmlNamespace	Retrieve the namespace value of an XML node.
xmlNode	Create an XML node
xmlPINode	Create an XML node
xmlRoot	Get the top-level XML node.
xmlSApply	Applies a function to each of the children of an XMLNode
xmlSize	The number of sub-elements within an XML node.
xmlTextNode	Create an XML node
xmlTreeParse	XML Parser
xmlValue	Extract the contents of a leaf XML node
[.XMLNode	Convenience accessors for the children of XMLNode objects.
[[.XMLNode	Convenience accessors for the children of XMLNode objects.