The following functions of the [http://www.w3.org/TR/xpath-functions-31/ XQuery 3.1 Functions and Operators] Working Draft have already been implemented:
<code>fn:contains-token</code>, <code>map:contains</code>, <code>map:entry</code>, <code>map:get</code>, <code>map:keys</code>, <code>map:newmerge</code>, <code>map:put</code>, <code>map:remove</code>
New signatures have been added for the following functions: