Possible codes: continuity (gradual change), cultural assimilation (by another quasi-polity in the absence of substantial population replacement), elite migration (the preceding elites replaced by new elites coming from elsewhere), population migration (evidence for substantial population replacement), secession (from another polity). In the narrative paragraph explain the evidential basis for the code: what are the proxies for change? Examples include DNA data, isotope data, material (other than subsistence) culture, subsistence mode, symbolic culture (incl. burial practices), settlement patterns.