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Welcome to 2026 unfounded hot takes.

Or less snarky: what's your gripe with zipped XML? It compresses reasonably well, has a useful structure, and has decades of mature tooling around it.

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Thanks! I had the exact same question for various of these posts here. I know these may be different groups of people, but I always see people advocating for simplicity, and zipped-XML is as simple as it gets, needs barely any extra dependencies (none in GIMP I assume), and is proven to work well (Word etc).

I also don’t understand why SQLite would be preferable here, considering you will likely also store large binary files alongside your document definition.. What does a db engine give me here?

The obvious alternative is SQLite, and it has many advantages. If you want to do a "zipped list of files", SQLite does that just fine (that's what SQLar is), but it can do so much richer data. Even if you don't want that, it still offers resiliency that "zipped XML" can't match: if your software or computer crashes in the middle of saving your file, it'll almost certainly corrupt it. With SQLite, not an issue: all transactions are atomic, they either happen entirely or not at all.

I don't know what "mature tooling" you're talking about for zipped XML, but I guarantee you it's not going to be better (or more mature) than SQLite and its ecosystem.

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