NetBeansв„ў IDE Field Guide: Developing Desktop, Web, Enterprise, and Mobile Applications (2nd Edition)
The error() function can be called when the application detects an error condition; it causes evaluation of the XPath expression as a whole to fail.
| Argument | Data Type | Meaning |
|---|---|---|
| value (optional) | item()? | The value can be used to identify the error, in an implementation-defined way. If the value is a string, it will probably be used as an error message |
| Result | None | This function does not return a result; it always raises an error |
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