# File rexml/element.rb, line 1133
  def prefixes
			ns = []
			each_attribute do |attribute|
				ns << attribute.name if attribute.prefix == "xmlns"
			end
			if @element.document and @element.document.doc_type
				@element.document.doc_type.attributes_of(@element.expanded_name).each {
					|attribute|
					ns << attribute.name if attribute.prefix == 'xmlns'
				}
			end
			ns
		end