I am not making a point about "HTML uses strings", but calling out the lack of separation between encoding and logical structure in the standart. Just for examp

I am not making a point about "HTML uses strings", but calling out the lack of separation between encoding and logical structure in the standart. Just for example, and sorry for mentioning it, but ASN.1 with its encoding rules provides terminology and a way to talk about encoding and semantics, so library writers do not have to reinvent it. Or, say, you want to generate some C++ code — what options except string templates do you even have? Standart does not help you to understand how to represent and encode senantics of a c++ source.