This page talks about ''higher-order functions'' introduced with [[XQuery 3.0]]. The BaseX-specific <code>hof</code> module containing some more very usful functions can be found at [[Higher-Order Functions Module]].
{{Version|7.7}}: In the upcoming version of the [http://www.w3.org/TR/xpath-functions-30 XQuery Functions and Operators] specification, some functions have been will be modified! Function arguments are now placed last in the function signature. Details are found below.
=Function Items=