A method and system for sharing data between a calling application and a callee application. A callee application receives a request for processing data owned and stored by the calling application in a data table. The callee application receives a document to which containers that include data elements from the data table are attached in a predefined order. The callee application identifies element types corresponding to the containers based on a mapping interface table. The callee application unloads data elements from the containers into a data store via the predefined order and associates the data elements with the corresponding element types. The callee application processes the data according to the request. The processing includes applying a business rule to a data element based on the business rule being associated with an element type of the data element. Only the callee application has knowledge of the applied business rule.