What is an .xsd file?

Hello. New here. Trying to figure this site out.

Infields 2024-06-18 06:51:05

Hello!

crismd 2024-06-16 05:24:57

HELLO

gioooochhh 2024-06-14 11:46:33

hello

Gioxchh 2024-06-14 11:41:02

Hello

Babycakes1 2024-06-04 05:37:06