This function is available only in Saxon-EE
This function provides a simple way of recovering from dynamic errors (including type errors).
try($arg1 as item()*, $arg2 as item()*) ==> item()*
This returns the value of the first argument, unless evaluation of the first argument fails. If a failure occurs, then the second argument is evaluated and its value is returned.
Here is an example showing the simpler form of call: the expression
saxon:try(1 div 0, "divide by zero") returns the string "divide by zero".
To recover from failures occurring in XSLT instructions, for example schema validation errors,
wrap the instructions in a stylesheet function (xsl:function) and call this function
within a call of saxon:try().
In XSLT, a more flexible mechanism for catching errors is the saxon:try
extension instruction. In XQuery, a more flexible mechanism is the XQuery 1.1 try{} expression.
