How does something become a Davar Shebakedusha? What is the criteria?
This question was inspired by the discussion over here. People half-standing for אלקינו in zimun
Perhaps someone can answer directly. Otherwise, this might help: Gather a list of things that are and a list of things that are not d'varim shebikdusha and see whether a rule can be figured out from the examples. I'm marking this answer "community wiki" so additions to it will be easier.