Ok. Some markings are from a language. Granted. You say that the text provides information. Sure. You say that the intent of the author may be lost forever, sure... maybe. I can go with that. I would grant that the author had intent.

So what?

It does not follow from this that the text is still meaningful. — creativesoul

It doesn't follow that it's not, unless your definition makes it so. In that case, the real question would be: why are you doing that? It doesn't seem helpful.