System and method for graphically creating queries on model data

1. A system for creating queries on model data of at least one data source in accordance with at least one data source specific format, wherein the system comprises:

processing resources including at least one processor and a memory;

a graphical query builder configured to enable a user to graphically define a query comprising a plurality of building blocks in accordance with a data source independent format; and

a plurality of adapters configured to translate the graphically defined query in the data source independent format into at least one corresponding query in the data source specific format, the plurality of adapters including a first adapter for a first data source configured to translate a portion of the graphically defined query in the data source independent format into a corresponding partial query in the first data source specific format, and a second adapter for a second data source configured to translate another portion of the graphically defined query in the data source independent format into a corresponding partial query in the second data source specific format, wherein

the first and second data sources are heterogeneous and at least one of the first and second adapters defines a mapping between objects in the first data source and the second data source.

2. The system of claim 1 , wherein the graphical query builder is further configured to enable the user to select one or more building blocks for defining the query in the data source independent format, wherein each building block represents a query object or a query relation.

3. The system of claim 2 , wherein the query relation is a relation between two query objects, a filter relation, and / or a user-defined relation.

4. The system of claim 1 , wherein model data of the first data source represents graphical model data and model data of the second data source represents non-graphical model data.

5. The system of claim 1 , wherein the system is configured for combining results of the partial queries.

6. The system of claim 1 , wherein the graphical query builder is configured to enable the user to graphically define queries in an iterative manner.

7. The system of claim 1 , wherein at least one of the adapters is a web service.

8. The system of claim 7 , wherein the web service is a RESTful web service.

9. The system of claim 8 , wherein the RESTful web service is configured for communicating with the graphical query builder using HTTP.

10. The system of claim 7 , wherein the web service is configured for communicating with the graphical query builder using HTTP.

11. The system of claim 1 , wherein the query in the data source independent format is a directed graph.

12. The system of claim 1 , wherein each adapter is configured to implement a common API for providing access to the model data in the respective data source.

13. The system of claim 1 , wherein the system is configured to store the query in the data source independent format on a storage medium; and

wherein the system is configured to use stored queries for graphically defining a further query.

14. The system of claim 1 , wherein at least one of the adapters is configured to access the at least one data source in accordance with an authorization and / or authentication mechanism.

15. The system of claim 1 , wherein the data source independent format is built from a plurality of meta models of the data source(s).

16. The system of claim 1 , wherein the data source independent format is a meta model that is common to a plurality of different data sources.

17. The system of claim 1 , further comprising:

wherein the data source independent format is built from a meta model of the first data source and a meta model of the second data source, and the query in the data source independent format includes objects from the first data source and the second data source.

18. A method for creating queries on model data of at least one data source in accordance with at least one data source specific format, the method comprising:

a. graphically defining a query with a graphical query builder running on a computer, the query comprising a plurality of building blocks in accordance with a data source independent format; and

b. translating, in connection with a plurality of adapters, the graphically defined query in the data source independent format into at least one corresponding query in the data source specific format, the translating comprising translating, in connection with a first adapter for a first data source, at least a portion of the graphically defined query into a corresponding partial query in the first data source specific format, and translating, in connection with a second adapter for a second data source, another portion of the graphically defined query into a corresponding partial query in the second data source specific format, wherein

the first and second data sources are heterogeneous and at least one of the first and second adapters defines a mapping between objects in the first data source and the second data source.

19. The method of claim 18 , wherein the query is graphically defined in an iterative manner.

20. The method of claim 18 , wherein model data of the first data source represents graphical model data and model data of the second data source represents non-graphical model data.

21. A non-transitory computer readable storage medium tangibly storing a computer program comprising instructions for at least:

graphically defining a query with a graphical query builder running on a computer, the query comprising a plurality of building blocks in accordance with a data source independent format; and

translating, in connection with a plurality of adapters the graphically defined query in the data source independent format into at least one corresponding query in the data source specific format, the translating comprising translating, in connection with a first adapter for a first data source, at least a portion of the graphically defined query into a corresponding partial query in the first data source specific format, and translating, in connection with a second adapter for a second data source, another portion of the graphically defined query into a corresponding partial query in the second data source specific format, wherein

the first and second data sources are heterogeneous and at least one of the first and second adapters defines a mapping between objects in the first data source and the second data source.