Not just people. What's the point of being able to embed MathML in your XHTML if there's only a single browser that understands it? And what's the point in using XHTML when you need to pretend it's just HTML tagsoup for 90% of your vistors' browsers?
> rather than in a schema or DTD (which used to resolve in band, even)
Except that only happened with a very small number of tools. Browsers never cared about DOCTYPE declarations other than as a signal (or at best a bunch of ENTITY definitions). And schemas provide no use other than validation.
XML is more verbose than JSON and XML Schema is more established than most of the JSON equivalents but none of that is relevant when talking about HTML. The only thing you gain from embedding your metadata in your HTML is colocation.
Truth in DOM was a dream that web developers chased for more than a decade. The reason it doesn't work is simply that rendering information is a lossy process. You either end up duplicating the same information multiple times in your markup (once for presentation, once for display) or adding layers of indirection to render or reverse the render at runtime. It's a fool's errand.
Not just people. What's the point of being able to embed MathML in your XHTML if there's only a single browser that understands it? And what's the point in using XHTML when you need to pretend it's just HTML tagsoup for 90% of your vistors' browsers?
> rather than in a schema or DTD (which used to resolve in band, even)
Except that only happened with a very small number of tools. Browsers never cared about DOCTYPE declarations other than as a signal (or at best a bunch of ENTITY definitions). And schemas provide no use other than validation.
XML is more verbose than JSON and XML Schema is more established than most of the JSON equivalents but none of that is relevant when talking about HTML. The only thing you gain from embedding your metadata in your HTML is colocation.
Truth in DOM was a dream that web developers chased for more than a decade. The reason it doesn't work is simply that rendering information is a lossy process. You either end up duplicating the same information multiple times in your markup (once for presentation, once for display) or adding layers of indirection to render or reverse the render at runtime. It's a fool's errand.