| width='120' | '''Signature'''
|<pre>proc:system(
$cmd as xs:string, $args as xs:string* := (), $options as map(xs:string := () xs:string*) as := ()
) as xs:string</pre>
|- valign="top"
| width='120' | '''Signature'''
|<pre>proc:execute(
$cmd as xs:string, $args as xs:string* := (), $options as map(xs:string := () xs:string*) as := ()
) as element(result)</pre>
|- valign="top"
| width='120' | '''Signature'''
|<pre>proc:fork(
$cmd as xs:string, $args as xs:string* := (), $options as map(xs:string := (*) xs:string) as := ()
) as element(result)</pre>
|- valign="top"