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docx/xslx are open formats. About psd, yes, that's proprietary. What government agency mandates its use for the public to interact with them? (genuinely asking

• vetinari 5y ago
  > docx/xslx are open formats. In theory, yes. In practice, you will see files in transitional schema in the wild and you need MS Office to work with them, unless they are not just a very basic document. (I had a similar case in the past, the document contained forms, and it would not render properly even with MS Office for Mac available at the time). > About psd, yes, that's proprietary. What government agency mandates its use for the public to interact with them? (genuinely asking, not being snarky) Not aware of G2C, but in other scenarios, it happens. In our country, public administration is not allowed to use rar either. Only zip, tar, gz, and tar.gz. Despite that, I did receive a rar once; also an Outlook .msg file. Rar was not really a problem, and .msg was solved by communicating with the other side (Mac Outlook cannot open them).