Format of .lib created by armar

Dear community,

I am looking for the format of .lib file created by armar, I know .lib file is a collection of the ELF of many functions, but I've searched through the internet and Arm official site and haven't been able to find any information. Could any body tell me is such document available and where I can find it? Thanks.

ps. I am looking for the meaning of each bit contained in a .lib file, not how to use armar.

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