8. A program product comprising a computer readable physically tangible storage device storing program code, said program code configured to be executed by a processor to implement a method, said method comprising the steps of: creating a semantic entity repository comprising (a) a structured entity set of entities and properties thereof; (b) reference ranges describing possible values of said properties; and (c) a plurality of mappings between said entities, said properties, and a data structure of a data warehouse; selecting, from said semantic entity repository, entities, properties and/or property values to be analyzed; defining how to calculate at least one measure; loading, from said data warehouse, a plurality of data corresponding to the selected entities, properties, and property values according to said mappings; calculating at least one of the defined measures; and marking a time-dependent property and defining mappings to the data warehouse for tracking the variation of the property, wherein said step of defining comprises incorporating an adjusting item related to said variation into the calculation of a measure related to said time-dependent property.
8. A program product comprising a computer readable physically tangible storage device storing program code, said program code configured to be executed by a processor to implement a method, said method comprising the steps of: creating a semantic entity repository comprising (a) a structured entity set of entities and properties thereof; (b) reference ranges describing possible values of said properties; and (c) a plurality of mappings between said entities, said properties, and a data structure of a data warehouse; selecting, from said semantic entity repository, entities, properties and/or property values to be analyzed; defining how to calculate at least one measure; loading, from said data warehouse, a plurality of data corresponding to the selected entities, properties, and property values according to said mappings; calculating at least one of the defined measures; and marking a time-dependent property and defining mappings to the data warehouse for tracking the variation of the property, wherein said step of defining comprises incorporating an adjusting item related to said variation into the calculation of a measure related to said time-dependent property. 17. The program product of claim 8 , where A denotes a first characteristic of the entities; where B denotes a second characteristic of the entities; wherein the time-dependent property comprises a first time-dependent component having a property value A 1 associated with the first characteristic A at a first time t 1 and a property value A 2 associated with the first characteristic A at a second time t 2 >t 1 ; wherein the time-dependent property comprises a second time-dependent component having a property value B 1 associated with the second characteristic B at the first time t 1 and a property value B 2 associated with the second characteristic B at the second time t 2 ; wherein the measure has a first component (M A ) and a second component (M B ); wherein M A has a value M A1 at the first time t 1 and a value M A2 at the second time t 2 ; wherein M B has a value M B1 at the first time t 1 and a value M B2 at the second time t 2 ; wherein the adjusting item has an adjustment value Δ; wherein the method further comprises calculating M A1 , M A2 , M B1 , and M B2 via 
 M A1 =A 1 , 
 M A2 =A 1 +A 2 −Δ, 
 M B1 =B 1 , 
 M B2 =B 1 +B 2 +Δ; and wherein Δ=M A1 .