Decision Support Systems (DSS) are computerized information system that helps decision makers with decision-making activities. DSS are interactive computer-based system that uses data, document, communication technologies, knowledge and model to support decision making process. Then we develop tracing of document-driven DSS to provide an explanation to improve the acceptance of decision makers, because decisions are based on both the inheritance among documents and acceptance of those advices for decision makers. So, we develop a tracing on the contents and the classification of interrelated documents to improve the explanation.