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. 9. The program product of claim 8 , wherein the step of creating a semantic entity repository comprises the step of modifying an existing semantic entity repository, wherein at least one of said entity set, said reference ranges, and said mapping in said existing semantic entity repository is an empty set into which new elements may be added, and wherein the step of modifying an existing semantic entity repository comprises the steps of: adding, deleting, or modifying the entities and properties thereof in said entity set; describing or modifying the reference ranges of possible values of properties; and creating, deleting, or modifying mappings between the entities and properties thereof and the data structure in the data warehouse.