module foo {
  namespace urn:foo;
  prefix foo;

  description +something;
  contact contact++;
  organization organiza++tion;

  leaf foo {
    type string;
    default +;
    description 'squot' + "dquot";
    reference "+" + '+';
  }

  leaf bar {
    type string;
    default ++;
    description "+ + ++";
    reference "++ + +";
  }

  leaf baz {
    type string;
    default /;
    description :;
    reference *;
  }

  leaf xyzzy {
    type string;
    description "a weird" +" concat";
    reference "another"+ " weird concat";
  }
}