|-
| '''Summary'''
|Returns the names of all query parameters available from the HTTP request. With [[RESTXQ]], this function can be used to access parameters that have not been statically bound by [[RESTXQ#Query Parameters|%rest:query-param]] annotations.
|-
| '''Example'''
|-
| '''Summary'''
|Returns the names of all headers available from the HTTP request. If [[RESTXQ]] is used, this function may help to find access headers that have not been statically bound by [[RESTXQ#HTTP Headers|%rest:header-param]] annotations.
|}
|-
| '''Summary'''
|Returns the names of all cookies in the HTTP headers available from the HTTP request. If [[RESTXQ]] is used, this function may help to find access cookies that have not been statically bound by [[RESTXQ#Cookies|%rest:cookie-param]] annotations.
|}