To find more on what we know on apposition, see the page on the wiki:
http://klingon.wiki/En/Apposition

I see that you have just edited that page, so I'm not going to try any edits now, but the entire section there about "appositions on -wI' nouns" is wrong. It claims that phrases like DIr QanwI' taS, wab labwI' jan, and QaDmoHwI' DIr are examples of apposition because they clarify what kind of thing the -wI' noun is. That is not what apposition is.

Apposition is when two proximate noun phrases provide independent descriptions or names of a thing. DIr QanwI' taS does not mean a skin protector, a solution; it means a solution of the skin-protector type. That is genitive and Klingon indicates the genitive through the noun-noun construction. It isn't apposition. DIr QanwI' taS, wab labwI' jan, and QaDmoHwI' DIr are all examples of the genitive noun-noun construction.

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SuStel
http://trimboli.name