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But at least webpages are in a standardized format. With the exception of images, some of the data might be in arbitrary formats or just not trivial.

> standardized format†

†: Parses unreliably at best, Turing-complete at worst. (aka javascript if you didn't catch that)

Webpages are, but the information isn’t. Multiple ways to layout your page; multiple ways to express your information; multiple languages; etc.