Informal attire, also called international business attire, Western business attire, or Tenue de ville is a dress code, typified by a suit and necktie. On the scale of formality, informal attire is more formal than casual but less formal than semi-formal. It is more presentational than semi-casual, but offers more room for personal expression than semi-formal dress. Informal should not be confused with casual, not even smart casual — in loose common usage, many people refer to informal dress as semi-formal or formal and formal dress (in the technical sense — that is, white tie, black tie, and similar) as very formal. The technical definition of informal is used in this article.