it's often heard in my daily work as a programmer in an investment bank, supporting mortgage backed securities desks (passthrough, agency cmo, cmbs, etc).
My take is that the terms describe the characteristics of the instruments. Is it used in more specific scope? For example, can we call price, coupon rate, duration, DV01, OAS "metrics" or "indicatives" of a bond? and what about those more specific to MBS products such as "prepayment rate"?