Which format does static library (*.lib) files use? Where can I find “Official” specifications of *.LIB file structure/format?

Question

Just now I found that static libraries in *nix systems, in other words *.a libraries are nothing but archives of relocatables(*.o files) in ar fromat.

1. What

Answer 1

I found that *.LIB file uses the ar file format.

Official Specifications: Section 7. "Archive (Library) File Format" of Microsoft Portable Executable and Common Object File Format Specification describes this format.