1. A method of configuring a manufacturing execution system including a production modeler, the method which comprises the steps of: receiving data of a first coding type from a first hierarchical layer, wherein the data of the first coding type originates as XML text from an enterprise resource planning layer; receiving data of a second coding type, which is different from the first coding type, from a second hierarchical layer, wherein the data of the second coding type originates as non-XML information from a control system of an automation layer; transforming at least one of the data of the first coding type and the data of the second coding type into a new data structure configured for implementing uniform data processing within the manufacturing execution system; handling the new data structure internally by a production modeler, the production modeler employing a parser for building the new data structure using a set of linear algorithms that are accessible to a user of the production modeler through a set of objects; wherein the XML text from the enterprise resource planning layer is converted by the parser to the new data structure by an application of a double stage parser, wherein the XML text is scanned in a first stage by linear algorithms looking for chunks of text enclosed between “<” and “>”, wherein the chunks of text include information about a hierarchy of the data, wherein the double stage parser prepares the structure according the hierarchy of the data, and wherein in a second stage the double stage parser extracts data from the chunks of text and fills the structure accordingly; and wherein the non-XML information from the control system of the automation layer is not converted, but nested inside a container of the new data structure thereby allowing propagation of all non-XML information inside the manufacturing execution system.