Files with xts suffix seems to be in most cases related to the Integrated Microcomputer Processing System.
XTS file extension - IMPS data file
What is xts file? How to open xts files?
File type specification:
File extension xts is mainly related to the Integrated Microcomputer Processing System (IMPS) and used for one of its default file type.
The Integrated Microcomputer Processing System (IMPS) performs the major tasks in survey and census data processing: data entry, data editing, tabulation, data dissemination, statistical analysis and data capture control which can be used as a complete processing system or as stand-alone modules.