'The bar' is a term used by some theorists to refer to a) the horizontal line in Saussure's model of the sign which acts as a boundary marker between the levels of the signifier and the signified and/or b) the virgule - a punctuation mark (in computer jargon called a 'forward slash') in the form of a slanted line linking and dividing paired terms in binary oppositions (e.g. active/passive). Poststructuralist theorists criticize the clear distinction which the Saussurean bar seems to suggest between the signifier and the signified. Note that in Saussure's model the signified is shown over the signifier but that Jacques Lacan placed the signifier over the signified with the intention of highlighting the primacy of the signifier. Some writers represent binary oppositions using a colon thus: old : new (rather than old/new).