[Done] 
  xmlName
  xmlAttrs
  xmlGetAttr
  xmlSize
  xmlChildren<-
  addChildren
  xmlChildren
coercion
xmlParent

xmlNamespace
xmlNamespaces
getSibling
xmlNamespaceDefinitions
xmlSApply/xmlApply
xmlAncestors

xmlValue


addNode
addSibling
removeChildren
removeNodes
removeXMLNamespaces
replaceNodes

newXMLNamespace
append

docName & docName<-

names

getNodeSet
xpathApply