Each element in the MREP is part of a relational database. This permits them to be linked to each other so that the inputs to a specific model and the results generated by running that model using those inputs are connected. Therefore, one major feature of the MREP is tracking and connecting all of the components of a model, which allows researchers to revisit previously generated results. A second important feature is that the linked components can be unified as part of the information retrieval process. This enables a query engine to present information to a user without having to browse irrelevant information.