aggregation

Bauman 2005


attribute

Burnard 1991, Vanhoutte 1998, Burnard 2014


attribute (global)

Burnard 2014


changing horses

Bauman 2005


class

Wittern et al. 2009


content model

Burnard 1991


data-centred

Burnard 2014


database

Sahle 2013b