Reduced syntax clutter in the error_log directive. The description text explains special values like "stderr", "syslog:...", and "memory:...". It is believed that syntax without explicitly listing these variants is more readable.

<!--
  Copyright (C) Igor Sysoev
  Copyright (C) Nginx, Inc.
  -->

X:stylesheet {

X:param VERSION = "'development'";

X:output method="text";

X:template = "/versions" { !! "download[@tag=$VERSION][1]/item[1]/@ver"; };

}