# File proofreader.rb, line 51
    def use_document(xml, use_internal_proof=false)
      if use_internal_proof
        proofsheets = Proofsheets.new
        @xml_document = proofsheets.load_document_proofsheets(xml)
        @proof = Proof.new(proofsheets)
      else
        if xml.is_a?(REXML::Document)
          @xml_document = xml_document
        else
          @xml_document = REXML::Document.new(fetch_xml(xml))
        end
      end
    end