I think that the noun {ghItlh} has the meaning of "handwritten text on
a paper, scroll, parchment", because of the sentence {ghItlh
vIghItlhta'bogh DalaD'a'?}.

Since the verb {ghItlh} means "engrave, incise, mark (upon), write",
then when this verb has the noun {ghItlh} as an object, then
seemingly/apparently the noun {ghItlh} must be something physical
(e.g. paper, scroll, parchment, etc..). I'd understand the noun
{ghItlh} as something referring to the text, if the above Ca'Non
sentence was instead {ghItlh vIqonta'bogh DalaD'a'?}.

Two things here. First, while the sentence ghItlh vIghItlhta'bogh DalaD'a' does suggest that the ghItlh being asked about is physical, that doesn't prove that every ghItlh must be physical. I agree that the verb and the noun being the same is strongly suggestive, but that isn't proof. We say we write when we type into our computers, after all, and we call the results of these actions documents. I don't know how far the word ghItlh stretches.

Second, we must remember that when ghItlh vIghItlhta'bogh DalaD'a' was written Okrand hadn't yet come up with the notion that qon was used for composition. (If he had, he left no evidence of this.) So we have to read the sentence with a little sensitivity to its intended meaning, and not jump too quickly to the conclusion that he was absolutely not talking about composition. By the later rule this sentence might be used for Will you read my printout?

-- 
SuStel
http://trimboli.name