JSONiq follows the W3C standard for constructing function items with inline expressions. The following explanations, provided as an informal summary for convenience, are non-normative.

A function can be built directly by specifying its parameters and its body as expression. Types are optional and by default, assumed to be item*.

Function items can also be produced with a partial function application.

**Example 38. Inline function expression**

function ($x as integer, $y as integer) as integer { $x + 2 }, function ($x) { $x + 2 }

**Result. **(two function items)

**Figure 24. InlineFunctionExpr**

**Figure 25. ParamList**