A method and system for storing pending changes to data having a data model is provided. In one embodiment, a pending change system receives a change that is to be made to the data. When the change is "committed," the change system determines whether the change to the data will result in changed data that is consistent with the data model. When the change system determines that the change is consistent, it updates the data accordingly. If, however, a change is not committed or committed but inconsistent, the change system stores the change in a pending change list associated with the data.