There is only one file type that uses the .JRXML extension:
JasperReports Layout File
File used by JasperReports, a Java library used for creating reports programmatically; contains report design definition in XML format; includes design elements such as report layout, text fields, images, charts, parameters, and variables.
JRXML files are compiled into .JASPER files, which may be used to create reports.
Updated: January 6, 2010