In assignment initially theorethical context of linguistic expressions is defined.First part continues to place the theory of language stratification, started in 1932 in Prague Linguistic Circle and in the second half of 20th century assumed in Slovene linguistic.First part also discusses about creation of slovene literary language and literary norm, continuing with arrangement of expressions in slovene theory of language stratification by Toporii (1971).Next to this contemporary definition of social stratification by Andrej E. Skubic ( 2005) is presented, concentrating on speeches of social groups (sociolects).Second part of assignment -based od research about elements of sociolects in discourse of slovene literature by Skubic (2006) and the concept of script by Roland Barthes (1971)places analised literary works, Fuinski bluz (Skubic, 2001) and efurji raus! (Vojnovi, 2008) into the fifth degree of development script as speech (Barthes, 1971).After presentation of literary works the analysis of communicative situations, where non-literary elements are used in speeches of all five literary figures, is discussed.At the beginning of the third part the treoretical description of reflextion of prague theory of linguistic stratification in SSKJ is presented.Moreover the presentation of activities during the time when SSKJ was published to SP 2001 is described, concluding with discussion about inclusion of linguistic stratification and sociolects in SP 2001.In the second, practical part linguistic analysis of elements of sociolects and speeches of literary figures are presented.The analysis is concentrated on lexical linguistic level and try to determine the relation between literary and non-literary language in works of contemporary slovene urban prose.