1. A Query Processor Modeler, comprising: means for selecting at least two Query Processor elements from a set of predefined query processor elements; means for attaching at least one selected robot query processor element to a dedicated data source of the data sources of the domain; means for combining at least two of the selected Query Processor elements; and means for executing said associated query processor elements on at least one computer system; and at least one of said query processor elements of the associated query processor elements being a Robot Query Processor Element adapted for accessing a dedicated web based data source, wherein the Query Processor Modeler further comprises a graphical user interface in a form of a visual programming tool means for customizing the at least one individual robot query processor element to the corresponding attached data sources; means for customizing at least one trigger query processor element to the query processor; and means for storing said combination of the selected Query Processor elements on a storage medium.