8. A method performed by an apparatus, connected to a source data base and a target data base, said apparatus comprising one or more processors and a memory device having stored computer readable instructions executable by the one or more processors for executing an import process for an automated meta model driven import of entity parts from the source data base to the target data base, wherein the automated meta model specifies an abstract model of the source data base or the target data base and comprises at least a description of an entity part and/or a private child reference being resolvable from a parent entity part of the source data base or the target data base which is identifiable outside the source data base or the target data base by a public key, wherein the resolution is to at least one referenced entity part of the source data base or the target data base and is identifiable only internally in the source data base or the target data base, and wherein the private child reference is used to override a pre-existing aggregation of entity parts in the target data base being referenced from an entity part of the target data base having the same public key as the parent entity part in the source data base, the method comprising: parsing an import file to build an initial graph of entity parts according to the meta model in a repository as staging memory for data import into the target data base; transforming the initial graph in the repository into an import graph of entity parts, said transforming comprising: identifying a next entity part in the initial graph being identifiable outside the source data base by a public key as next first level source entity part; searching the target data base for an entity part which has a public key corresponding to the public key of the next first level source entity part as next first level target entity part; deleting entity parts being referenced by the next first level target entity part in the target data base when the referenced entity parts are identifiable internally in the target data base and a private child reference of the meta model indicates that such entity parts are to be deleted in the target data base prior to data import; completing the next first level target entity part and its referenced entity parts with data from the target data base, said completing comprising: resolving public references of the next first level target entity part from the repository or from the target data base; resolving 1:1 references of the next first level target entity part; proceeding recursively with the resolution of public references and 1:1 references from the next first level target entity part to its referenced entity parts; propagating references being identifiable internally in the target data base and corresponding to transient references parsed from the import file from the target data base into the import graph; creating an import sequence for entity parts in the import graph in accordance with types of references according to a rule that child entity parts follow parent entity parts; reordering the import sequence such that the entity parts which are referenced are listed prior to entity parts referencing entity parts; and updating the target data base on the basis of the import graph of entity parts.
8. A method performed by an apparatus, connected to a source data base and a target data base, said apparatus comprising one or more processors and a memory device having stored computer readable instructions executable by the one or more processors for executing an import process for an automated meta model driven import of entity parts from the source data base to the target data base, wherein the automated meta model specifies an abstract model of the source data base or the target data base and comprises at least a description of an entity part and/or a private child reference being resolvable from a parent entity part of the source data base or the target data base which is identifiable outside the source data base or the target data base by a public key, wherein the resolution is to at least one referenced entity part of the source data base or the target data base and is identifiable only internally in the source data base or the target data base, and wherein the private child reference is used to override a pre-existing aggregation of entity parts in the target data base being referenced from an entity part of the target data base having the same public key as the parent entity part in the source data base, the method comprising: parsing an import file to build an initial graph of entity parts according to the meta model in a repository as staging memory for data import into the target data base; transforming the initial graph in the repository into an import graph of entity parts, said transforming comprising: identifying a next entity part in the initial graph being identifiable outside the source data base by a public key as next first level source entity part; searching the target data base for an entity part which has a public key corresponding to the public key of the next first level source entity part as next first level target entity part; deleting entity parts being referenced by the next first level target entity part in the target data base when the referenced entity parts are identifiable internally in the target data base and a private child reference of the meta model indicates that such entity parts are to be deleted in the target data base prior to data import; completing the next first level target entity part and its referenced entity parts with data from the target data base, said completing comprising: resolving public references of the next first level target entity part from the repository or from the target data base; resolving 1:1 references of the next first level target entity part; proceeding recursively with the resolution of public references and 1:1 references from the next first level target entity part to its referenced entity parts; propagating references being identifiable internally in the target data base and corresponding to transient references parsed from the import file from the target data base into the import graph; creating an import sequence for entity parts in the import graph in accordance with types of references according to a rule that child entity parts follow parent entity parts; reordering the import sequence such that the entity parts which are referenced are listed prior to entity parts referencing entity parts; and updating the target data base on the basis of the import graph of entity parts. 12. The method of claim 8 , wherein the step of updating the target data base on the basis of the import graph comprises the steps of creating database statements modeling the import graph for subsequent storage thereof in the target data base.