Temporal and Evolving Data Warehouse Design

Table 6

A comparative analysis of evolution schemes for schema changes.

Evolution schemes; (last name, year)	References	Level of changes		Schema level changes
		Schema	Data	Dimension	Fact	Hierarchy	Level	Attribute	Measure	Level movement
(Blaschka, 2000)	[2]
(Sarda, 1999)	[13]
(Blaschka et al., 1999)	[17]
(Marotta, 2000)	[18]
(Letz et al., 2002)	[19]
(Kaas et al., 2004)	[20]
(Rechy-Ramírez and Benítez-Guerrero, 2006)	[21]
(Bliujute et al., 1998)	[29]
(Vaisman, 2001)	[38]
(Vaisman et al., 2004)	[39]
(Hurtado et al., 1999)	[43]

Note. In [18], changes from source schema and support changes in attribute and relations are adapted. Rest of the schemes support changes arise due to changing business requirements.