Barthes adopted from Hjelmslev the notion that there are different orders of signification (levels of meaning) in semiotic systems. The first order of signification is that of denotation: at this level there is a sign consisting of a signifier and a signified. Connotation is a second-order of signification which uses the denotative sign (signifier and signified) as its signifier and attaches to it an additional signified. Barthes argues that the orders of signification called denotation and connotation combine to produce ideology in the form of myth -which has been described as a third order of signification. Differences between the three orders of signification are not clear-cut.