@stefan.hoehn thanks for the links. I read through the semantics discussion. I now better understand where my overall confusion on semantics comes from - legacy items. and i think I still have not completely understood the various elements due to mixing of terms in the discussion. But, never mind.
As of the icon sets, that seems to be a rabbit hole on its own
@mstormi yes, you are right. I should not have mixed the two topics. Found it - although not where I would have expected it.