Interesting expiration date, only a 3 month extension.
I apologize for causing confusion, I am not familiar with Let's Encrypt and should've waited to post.
The files are XML Schema Definition (XSD) files. That is, files that describe what format the data should be referenced. Pic is a graphical view of that file. The source code to the voting system is not part of that email chain.
>>14330870 (me)
However, this GitHub repo looks interesting.
https://github.com/stevecheckoway/frontier-election-system