data
The atomic value of a node
Description
The fn:data function accepts a sequence of items and returns their typed values. For atomic values, this simply means returning the value itself, unchanged. For nodes, this means extracting the typed value of the node.
Calling this function is often unnecessary because the typed value of a node is extracted automatically (in a process known as atomization) for many XQueryXPath 2.0 expressions, including comparisons, arithmetic operations and function calls. The most common use case for the fn:data function is in XQuery element constructors.
Parameters |
Description |
|---|---|
arg:string() |
the item to get the value of |
Examples
XPath |
Results |
|---|---|
data($cat//product[1]/number) |
557 |
data($cat//number) |
(557, 563, 443, 784) |
data($cat//product[1]/@dept) |
WMN |
data($cat//product[1]/colorChoices) |
navy black |
data($cat//product[1]) |
557 Fleece Pullover navy black |
data($cat//product[4]/desc) |
Our favorite shirt! |