A method and system for converting XML files to and from files in a data format based on hierarchies in real-time. A method for converting from XML to the data format based on hierarchies includes: applying a stylesheet to at least one XML file thereby generating at least one data record in an intermediate format and including information included in the at least one XML file; and, translating the at least one record in the intermediate format to the data format based on hierarchies. A method for converting from a data format based on hierarchies to XML includes: translating at least one record including information stored in the file format based on hierarchies to an intermediate format; and, applying a stylesheet to the at least one record in the intermediate format thereby generating at least one XML file being indicative of the information and suitable for transmission.