Tex, because it's author didn't care to reuse XML.
Having used it for publications and during the university i really, i despise Tex. Simply the language sucks, the outcome is nice, but those slashes and parenthesis really sucked.
With a XML syntax we could easily create beautiful editors, make it easy to parse with schema validation, etc.
Problem is that this card castle grew, avoiding alternatives such as docbook, and is and will always be a mess, since it's foundations are not parseable.
Having used it for publications and during the university i really, i despise Tex. Simply the language sucks, the outcome is nice, but those slashes and parenthesis really sucked.
With a XML syntax we could easily create beautiful editors, make it easy to parse with schema validation, etc.
Problem is that this card castle grew, avoiding alternatives such as docbook, and is and will always be a mess, since it's foundations are not parseable.