Inspector Javert is a character in Victor Hugo's novel Les Misérables. In the novel, he pursues the main character, Jean Valjean, across France for twenty years for stealing a loaf of bread. He later commits suicide, due to his own "inflexibility".
Michael Eddington compared Benjamin Sisko to Javert, and himself to Jean Valjean, during Sisko's pursuit of the former Starfleet officer in 2373. Eddington would also call Sisko "Javert" when they talked. (DS9: "For the Uniform")