with co-existence rather than change; and structures are the "real things" that lie beneath the surface or the appearance of meaning. In linguistics In Ferdinand de Saussure's Course in General Linguistics, the analysis focuses not on the use of language (parole, 'speech'), but rather on the underlying system of language (langue). This approach examines how the elements of language relate to each other in the present, synchronically rather than diachronically. Saussure argued that linguistic signs were composed of two parts: a signifiant ('signifier'): the "sound pattern" of a word, either in mental projection—e.g., as when one silently recites lines from signage, a poem to one's self—or in actual, any kind of text, physical realization as part of a speech act. a signifié '(signified'): the concept or meaning of the word. This differed from previous approaches that focused on the relationship between words and the things in the world that they designate. Although not fully developed by Saussure, other key notions in structural linguistics can be found in structural "idealism." A structural idealism is a class of linguistic units (lexemes, morphemes, or even constructions) that are possible in a certain position in a given syntagm, or linguistic environment (such as a given sentence). The different functional role of each of these members of the paradigm is called 'value' (French: ). Prague School In France, Antoine Meillet and Émile Benveniste continued Saussure's project, and members of the Prague school of linguistics such as Roman Jakobson and Nikolai Trubetzkoy conducted influential research. The clearest and most important example of Prague school structuralism lies in phonemics. Rather than simply compiling a list of which sounds occur in a language, the Prague school examined how they were related. They determined that the inventory of sounds in a language could be analysed as a series of contrasts. Thus, in English, the sounds /p/ and /b/ represent distinct phonemes because there are cases (minimal pairs) where the contrast between the two is the only difference between two distinct words (e.g. 'pat' and 'bat'). Analyzing sounds in terms of contrastive features also opens up comparative scope—for instance, it makes clear the difficulty Japanese speakers have differentiating /r/ and /l/ in English and other languages is because these sounds are not contrastive in Japanese. Phonology would become the paradigmatic basis for structuralism in a number of different fields. Based on the Prague school concept, André Martinet in France, J.