Is there a way of adding keywords, so you can search on them in the XMP, but not have them embedded in exported Jpegs (or Tiffs).
It's useful for internal organisation/workflow to add keywords that can be searched on, but these aren't keywords you would want embedded in exported Jpegs.
I am hoping there might some simple tool like enclosing a word with a particular character that identifies it as being for internal use only e.g. dashes -possible for project D-, -Reference pic only-, -might suit agency Y-
I wouldn't actually use such long keywords, but I've written them out in long hand to explain the point.
Both Lightroom and Capture One have this facility. In LR you indicate that a specific keyword shouldn't be exported and in C1 you create a list of exportable keywords. Keyword not on the list aren't exported, It's clumsier than LR but serves the same purpose.