code: def build_marc(recid, single_keywords, composite_keywords,
                 spires=False, author_keywords=None, acronyms=None):
      
      output = ['<collection><record>\n'
                '<controlfield tag="001">%s</controlfield>' % recid]
  
      # no need to sort
      single_keywords = single_keywords.items()
      composite_keywords = composite_keywords.items()
  
      output.append(_output_marc(
          single_keywords,
          composite_keywords,
          author_keywords,
          acronyms
      ))
  
      output.append('</record></collection>')
  
      return '\n'.join(output)
docs: Create xml record.
  
      :var recid: integer
      :var single_keywords: dictionary of kws
      :var composite_keywords: dictionary of kws
      :keyword spires: please don't use, left for historical
          reasons
      :keyword author_keywords: dictionary of extracted keywords
      :keyword acronyms: dictionary of extracted acronyms
      :return: str, marxml