class REXML::XPathParser

def child(nodeset)
  nodesets = []
  nodeset.each do |node|
    raw_node = node.raw_node
    node_type = raw_node.node_type
    # trace(:child, node_type, node)
    case node_type
    when :element
      nodesets << raw_node.children.collect.with_index do |child_node, i|
        XPathNode.new(child_node, position: i + 1)
      end
    when :document
      new_nodeset = []
      raw_node.children.each do |child|
        case child
        when XMLDecl, Text
          # Ignore
        else
          new_nodeset << XPathNode.new(child, position: new_nodeset.size + 1)
        end
      end
      nodesets << new_nodeset unless new_nodeset.empty?
    end
  end
  nodesets
end