Martin (1992: 4):
Following Hjelmslev (1961), paradigmatic relations are mapped onto potential and syntagmatic relations are mapped onto actual; thus system is described in terms of paradigmatic oppositions, process in terms of syntagmatic structure. System and process are related through the important concept of realisation.
 This confuses realisation and instantiation. The relation between the axes, paradigmatic and syntagmatic, is one of realisation. The relation between potential and actual is one of instantiation.
 This also confuses realisation and instantiation, but in a different way. Here the instantiation process is confused with the realisation of paradigmatic options as syntagmatic structure.
 This confuses syntagmatic structure and the process of instantiation. It isn't system and process that are related through realisation, but system and structure.