The difference between .sv and .svh

.sv documents is no essential difference with .svh file. Typically, the package needs to be to include the file type is defined as .svh other file types defined as .sv.
.svh file suffix that is systemverilog include files.
Templates that are declared WITHIN class The scope of Package A Separated Should BE OUT INTO A .svh Individual Files with Extension Should BE THESE Files. included in the package in the order in which they need to be compiled. The package file is the only place whereIncludes Should Used BE, BE Should there `NO Further Inside the include statements included Files The Justification:. Having The classes declared in separate files makes them easier to maintain, and it also makes it clearer what the package content is.