Introduction - If you have any usage issues, please Google them yourself
ModelSim SE configured in the library function in Modelsim Xilinx installation root directory create a new folder to put all the library files xilinx, it can be named xilinx_lib. Similar Xinlinx installation file: \ .. \ \ Xilinx \ verilog \ src in the various libraries in New xilinx_lib each folder under the file named rule: If the src folder named unisims, the file in the xilinx_lib new folder under the folder for the unisims_ver, and this similarity, the new name simprims_ver, XilinxCoreLib_ver, iSE_ver unisims_ver each folder.