/p><pre>
      -a        to make NAMEs indexed arrays (if supported)
      -A        to make NAMEs associative arrays (if supported)
      -i        to make NAMEs have the `integer' attribute
      -l        to convert NAMEs to lower case on assignment
      -r        to make NAMEs readonly
      -t        to make NAMEs have the `trace' attribute
      -u        to convert NAMEs to upper case on assignment
      -x        to make NAMEs export
</pre>

<p> Using `+' instead of `-' turns off the given attribut