1. A data processing method, comprising: receiving, at a data extractor, information identifying an enterprise resource planning system, the identification information comprising an identifier of the enterprise resource planning system; selecting, from a table of the data extractor, one or more predefined resource description framework queries, the selecting being based on a resource description framework specification compliant data source linked to a Semantic Web and on a key comprising the received identification information; querying, by the data extractor, the resource description framework specification compliant data source to extract data by executing one or more of the selected predefined resource description framework queries, wherein the one or more selected predefined resource description framework queries have an assigned repetition frequency based on the frequency of change of data to be extracted from the data source or an importance of a timely detection of a change of the data to be extracted from the resource description framework specification compliant data source; and processing the extracted data by the enterprise resource planning system, comprising: determining whether the extracted data includes new data that is of interest to one or more service consumers; and responsive to determining whether the extracted data includes new data that is of interest to the one or more service consumers, sending an event message alerting the one or more service consumers of the new data.