Boolean/binary denoting if the question is

• (if true) a relational one, about the relation between the parties, or
• (if false) about a property — a stable characteristic of one of the parties.

If QRelB is true, the value is not recorded, but can be varied at will in any Enquiry. It's about how the parties currently want to relate, not about who they are.

• QID

• on the HTML site