| width='120' | '''Signature'''
|<pre>request:parameter(
$name as xs:string,
$default as xs:string := ()
) as xs:string*</pre>
| width='120' | '''Signature'''
|<pre>request:header(
$name as xs:string,
$default as xs:string := ()
) as xs:string?</pre>
| width='120' | '''Signature'''
|<pre>request:cookie(
$name as xs:string,
$default as xs:string := ()
) as xs:string?</pre>
| width='120' | '''Signature'''
|<pre>request:attribute(
$name as xs:string,
$default as item()* := ()
) as item()*</pre>
| width='120' | '''Signature'''
|<pre>request:set-attribute(
$name as xs:string,
$value as item()*
) as empty-sequence()</pre>