trace
Reports tracing information in an implementation-defined way
Description
The fn:trace function accepts items and a label for those items, and returns the items unchanged. The exact behavior of the function is implementation-dependent, but generally the processor puts the label and the value of the items in a log file or user console.
Parameters |
Description |
|---|---|
value:item() |
the items to trace |
label:string() |
a label to display with the trace information |
Examples
XPath |
Results |
Explanation |
|---|---|---|
trace($var1, ‘The value of $var1 is: ‘) |
The value of $var1 is: 4 |
an example of what a processor might write to a log file |
XPath |
Results |
|---|---|
trace($var1, ‘The value of $var1 is: ‘) |
The value of $var1 is: 4 |