code: def process_annotation(self, ann):
          
          tmpl = self.xsl_template("@" + self.qname(ann))
          ET.SubElement(tmpl, "param", name="level", select="0")
          ct = self.xsl_calltemplate("leaf", tmpl)
          ET.SubElement(ct, "with-param", name="level", select="$level")
          self.xsl_withparam("nsid", ann.i_module.i_modulename + ":", ct)
          self.type_param(ann, ct)
docs: Process metadata annotation.