There is now a noteworthy echo among researchers that error prone, idiosyncratic practice may turn out to be the hallmark of markup language innovation. Alongside these concerns is an acknowledgement that the functionality achieved through markup languages has been less than was expected and diffusion slower than anticipated. -Scifleet et al, 2006
"Does the digital representation of the text demand the definition of a model? In and of itself, every representation and, consequently, every form of text representation entails the implicit or explicit assumption of a model, at least if we accept the postulate that the “map is not the territory.”1 So, the conventional image of a text, handwritten or typed, is itself a text model. The same thing can be said, then, of its digital representation or, to be more precise, of every form of its digital representation, regardless of its specific kind.