The following functions have been added in the [https://www.w3.org/TR/xpath-functions-31/ XQuery 3.0 Functions and Operators] Specification:
<code>analyze-string</code>* , <code>available-environment-variables</code>, <code>element-with-id</code>, <code>environment-variable</code>, <code>filter</code>, <code>fold-left</code>, <code>fold-right</code>, <code>for-each</code>, <code>for-each-pair</code>, <code>format-date</code>, <code>format-dateTime</code>, <code>format-integer</code>, <code>format-number</code>, <code>format-time</code>, <code>function-arity</code>, <code>function-lookup</code>, <code>function-name</code>, <code>generate-id</code>, <code>has-children</code>, <code>head</code>, <code>innermost</code>, <code>outermost</code>, <code>parse-xml</code>, <code>parse-xml-fragment</code>, <code>path</code>, <code>serialize</code>, <code>tail</code>, <code>unparsed-text</code>, <code>unparsed-text-available</code>, <code>unparsed-text-lines</code>, <code>uri-collection</code>
New signatures have been added for the following functions: