XISE - Xilinx ISE Project File
This is a project file generated by the ISE software application which is used to design computer hardware electronics and devices. It stores a list of the source files utilized by the project as well as the properties as well as the software version for that project. It is also used to design FPGA (field programmable gate arrays). NOTE: This file extension was initially introduced with ISE version 11 while versions 7 through 10 use the ISE extension and versions 5 and 6 use the NPL file extension.