The XPath function fit-serialize generates a storable and human readable representation of the given node-set. For example, you could use this function to obtain a string representation of an XML DOM and log it via the fit-log() function for debugging.
If the type of the argument is scalar (string, number or boolean), the argument is cast to string and output as is.
If the pretty-print parameter is set to true() (which is the default), the fit-serialize function will try to generate nicely formatted output for a node-set. If set to false() the argument is output as is.