* <code>math:pi()</code>, <code>math:sin()</code>, and many others (see [[Math Functions]])
* <code>fn:analyze-string()</code>
* <code>fn:available-environment-variables()</code>
* <code>fn:element-with-id()</code>
* <code>fn:environment-variable()</code>
* <code>fn:filter()</code>
* <code>fn:fold-left()</code>
* <code>fn:fold-right()</code>
* <code>fn:function-arity()</code>
* <code>fn:function-name()</code>
* <code>fn:generate-id()</code>
* <code>fn:head()</code>
* <code>fn:map()</code>
* <code>fn:map-pairs()</code>
* <code>fn:parse-xml()</code>
* <code>fn:serialize()</code>
* <code>fn:tail()</code>
* <code>fn:generateunparsed-id()</code>* <code>fn:analyze-string()</code>* <code>fn:environment-variable()</code>* <code>fn:available-environment-variablestext()</code>
* <code>fn:unparsed-text-available()</code>
* <code>fn:unparsed-text-lines()</code>
* <code>fn:unparsed-text()</code>
* <code>fn:element-with-id()</code>
* <code>fn:parse-xml()</code>
* <code>fn:uri-collection()</code>
* <code>fn:serialize()</code>
New signatures have been added for the following functions: